ИСТОЧНИК РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ С СФОРМИРОВАННОЙ РАДИАЦИОННОЙ КАРТИНОЙ

Использование: для получения постоянного или импульсного рентгеновского излучения малой мощности. Источник рентгеновского излучения содержит кожух (12), источник питания, удлиненный трубчатый зонд (14), узел (26) мишени и узел (29') управления лучом. Кожух закрывает источник (22) электронного луча и имеет элементы для генерации электронного луча вдоль траектории луча. Источник питания является программированным для управления напряжением, током и временем генерации электронного луча. Узел (26) мишени включает элемент мишени, расположенный вдоль траектории луча и приспособленный для испускания рентгеновского излучения в заданной спектральной области в ответ на падающие электроны. Узел (29') управления лучом включает элемент (30) отклонения, контур (31) обратной связи и контроллер (144) отклонения. Элемент (30) отклонения отклоняет луч от условной оси, выбранной поверхностной области на элементе (26) мишени в ответ на сигнал управления отклонением. Контур (31) обратной связи включает элементы ...

КОЛЛИМАТОР ДЛЯ ЖЕСТКОГО РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ

Изобретение относится к коллиматору для жесткого рентгеновского излучения. Тело коллиматора сформировано набором пластин толщиной d, выполненных из материала с высоким коэффициентом поглощения рентгеновского излучения, к каждой такой пластине с одной стороны прикреплены 2i+1, где i от 1 до n - натуральное число, пластин из прозрачного для рентгеновского излучения материала, а толщина каждой из этих пластин Dопределяется соотношением D=D+h(D+d)/2/f((k-1)/i-1)), где d - толщина пластины из материала с высоким коэффициентом поглощения рентгеновского излучения, D - средняя высота зазора между пластинами толщиной d, f- расстояние от источника излучения до середины коллиматора, k - номер пластины по ходу излучения; набор пластин образует периодическую решетку с периодом d+D. Обеспечена фокусировка периодической решетки на источник излучения; часть пластин толщиной d вместе с прилегающими пластинами толщиной Dв области отверстия коллиматора выполнены состоящими из двух равных частей, установленных ...

РЕНТГЕНОВСКАЯ ТРУБКА

Изобретение относится к рентгенотехнике, а более конкретно - к рентгеновским трубкам со средствами регулирования размера фокуса и анодного тока. С целью обеспечения оптимального использования нагрузочной способности трубки, накальный катод размещен в изолированном от него фокусирующем электроде, поперечное сечение которого имеет форму ступенчатого паза, в корневой части которого по меньшей мере частично утоплен катод. Ширина Н внешней части ступенчатого паза выбрана большей его глубины G, преимущественно в диапазоне отношений Н/G 1,5 - 2,5. В этом случае действует механизм ограничения пространственным зарядом площади, эмиттирующей поверхность катода, с которой под действием напряжения между анодом и катодом происходит вывод термоэмиссионных электронов из катодного узла по направлению к аноду, в зависимости от приложенного к фокусирующему электроду напряжения смещения.

Рентгеновская трубка

Рентгеновская разборная трубка для спектрального анализа

Рентгеновская трубка

Interstitielle Röntgennadel

X-ray tube with circular electron beam emitters, e.g. for medical apparatus

The X-ray tube has an evacuated housing containing a pair of circular electron beam emitters (11,12) with respective electron-emitting cathodes (13) and focusing electrodes (14) and a rotary anode (4), coupled to a rotation drive. The electromagnetic system (19) for deflection and focusing of the electron beams provides a quadruple field and a superimposed switched dipole field, parallel to the common plane of both emitters.

Entladungsroehre, insbesondere Roentgenroehre

Erweiterte Multi-Fleck-Computertomographie-Röntgenstrahlquelle

Offenbart sind Systeme und Verfahren, die dazu dienen, Multi-Schichtbilder mit einer Gesamtdicke von bis zu etwa 160 mm oder mehr während einer einzigen Gantryumdrehung in der Computertomographie oder der Volumen-Computertomographie zu gewinnen. Ein Ausführungsbeispiel weist eine erweiterte Multifleck-Röntgenstrahlenquelle für Computertomographie oder Volumen-CT-Bildgebung auf, zu der gehören: eine Elektronenstrahlquelle (50), die in der Lage ist, eine Vielzahl von Elektronenstrahlen (52) zu erzeugen, wobei jeder Elektronenstrahl (52) auf eine vorbestimmte Entfernung fokussiert ist und in eine vorbestimmte Richtung gezielt abgegeben wird; und mehrere Zielplatten (62), die angeordnet sind, um die Elektronenstrahlen (52) aufzunehmen und in Antwort darauf Röntgenstrahlen (16) zu erzeugen, wobei jede Zielplatte (62) einen vorbestimmten Brennfleck (83) darauf aufweist, wobei jeder Elektronenstrahl (52) synchronisiert ist, so dass dieser in einem geeigneten Zeitpunkt auf einer vorbestimmten Zielplatte ...

VERFAHREN UND EINRICHTUNG FUER DIE TRANSAXIALE RECHNERUNTERSTUETZTE ROENTGENTOMOGRAPHIE

X-RAY DIAGNOSTIC INSTALLATION WITH AN X-RAY TUBE

Kathodensystem für eine Röntgenröhre

Improvements relating to x-ray generators

... 696,187. Control systems for X-ray tubes. NEWTON VICTOR, Ltd. Dec. 28, 1951 [April 6, 1951], No. 30334/51. Class 38 (iv). [Also in Group XL (a)] A grid-controlled X-ray tube derives its operating voltage from a transformer 41, the filament 24 being energized from a transformer 44. The control grid 33 is negatively biased from an insulating transformer 47 through a network 50, the grid voltage being approximately 180 degrees out of phase with the anode voltage. Suitable values for the resistance 5 and condenser 51 are given.

APPARATUS AND METHOD FOR GENERATING X-RAYS

... 1444109 Automatic control of x-ray generators NIHON DENSHI KK 27 Dec 1973 [27 Dec 1972] 59832/73 Heading G3N An electron beam is scanned over a target to produce x-rays. A beam control signal is derived corresponding to the sensed scanning velocity and is used to prevent damage to the target by excessive irradiation. In the embodiment of Fig. 1, electrons pass from a filament source 2 to a target 7 by way of a Wehnelt cylinder 3, anode 4, focusing lenses 5, 6 and scanning deflection coils 10,11. X-rays from the target pass through a pinhole 14 and object 15 to a detector 16 with an associated display tube 18. The amplitude and frequency of the scanning signal fed to coils 10, 11 by an amplifier 12 are measured by detectors 19, 20, output signals from which are multiplied together in a circuit 21 to produce a scanning velocity signal forming a control signal.. The bias voltage supplied to the filament 2 and cylinder 3 by a source 22 is adjusted by the control signal so that the electron ...

X-ray computer tomography system

X-ray tube with self-biasing deck

Improvements in Cathodes for Rontgen-ray tubes and like Apparatus.

... 23,316. Green, H. Oct. 12. Vacuum tubes.- The cathode in a R ÷ n t g e n - r a y or other tube is provided with means for preventing restriction of the area from w h i c h the cathode r a y s are projected. Fig. 1 s h o w s a cathode with a hole 6 in the middle and carried by a hollow stem 5, the cathode stream produced being tubular in shape. It i s stated that parallel rays are produced. In a modification, the stem is hollowed at the top part only, a piece of glass or other material being placed at the bottom of the hole.

X-RAY COMPUTER TOMOGRAPHY APPARATUS

The X-ray source comprises a ring anode 4 and a plurality of electron sources arrange to sequentially project electron beams onto the anode ring. The electron beam from each source may additionally be scanned electromagnetically over a portion of the anode ring. ...

X-ray source with improved target lifetime

There is provided an x-ray source (10) comprising: an enclosure body (12); a target (14) permanently fixed to or forming part of the enclosure body (12); an electron beam source within the enclosure body (12), the electron beam source (16, 18) configured to produce an electron beam along a beam path between the electron beam source (16, 18) and the target (14), the electron beam incident on the target (14) to generate x-rays; an electron beam focussing assembly (30, 36) positioned around the beam path between the target (14) and the electron beam source (16, 18); a first electron beam steering means (32) positioned around the beam path between the electron beam source (16, 18) and the electron beam focussing assembly (30, 36); and a second beam steering means (34) positioned around the beam path between the first electron beam steering means (32) and the target (14), wherein the first and second beam steering means (32, 34) are adjustable to alter a position of incidence of the beam on ...

Improvements in x-ray tubes

Apparatuses and methods for generating distributed x-rays

An apparatus for generating distributed x-rays comprises an electron gun 1 (e.g. hot cathode) to generate electron beam currents, a scanning device 2 to generate a magnetic field for deflecting the electron beam currents, a current-limiting device 4 provided in the travel path of the deflected electron beams, and an anode target 5 arranged downstream of the current limiting device 4. The current-limiting device 4 has regular holes or apertures arranged in an array, such that when the electron beam currents scan across the device 4, pulsed electron beams corresponding to the positions of the holes or apertures are outputted sequentially. The pulsed electron beams are accelerated towards the anode 5 and bombard the anode target 5 to sequentially generate a distributed array of x-rays. A focusing device 7 may be provided to reduce the beam spot of the electron beam before deflection.

X-ray tube electron sources

Vacuum Tubes.

... 14,940. Green, H. June 28. Vacuum tubes; R÷ntgen-ray tubes.-The cathode e of a R÷ntgen-ray tube, valve tube, or other vacuum tube is provided with a backwardly - extending cylindrical cooling-body f of the same diameter as the cathode. The cathode e is concave and the body f is preferably recessed at the back as shown.

Improvements in and relating to x-ray apparatus

... 151,999. British Thomson - Houston Co., (Assignees of Langmuir, I.). Oct. 29, 1913, [Convention date]. R÷ntgen-ray tubes.-In a high-vacuum tube having an incandescent cathode, as described in Specification 14892/13, a screen is provided for adjustably controlling the focussing of the electron stream, for instance by means of a potential applied between the screen and the cathode. As shown, a nickel, iron, or tungsten screen 8, surrounding an incandescent cathode 2, is maintained at any desired potential by means of a continuouscurrent dynamo 15 with an adjustable resistance 25, and a change-over switch 18 for making the screen potential positive or negative with respect to the cathode. A battery or a source of static potential may be used instead of the dynamo. A negative screen potential produces sharp focusing, and a positive potential, if sufficiently high, may entirely prevent focusing. In a modification, an alternating potential is applied to the screen by means of a transformer, the ...

Improvements in or relating to cathodes for electron discharge devices

... 524,240. Thermionic cathodes. EHRENBERG, W. Jan. 25, 1939, Nos. 2528 and 12579. [Class 39 (i)] Thermionic cathodes for cathoderay or X-ray tubes &c. consist of a disc 3 of electron emitting material such as tantalum, columbium, tungsten or zirconium or coated with an electron emitting material, which is heated by an electron emitting filament 7. The disc is supported by three arms 4 which are inclined to the plane of the disc from a support 5 closed at one end except for the aperture 6 in which the disc is positioned in spaced relation thereto. The heater is a spiral filament 7 connected at one end to and surrounded by a focusing shield 8, the whole being supported from a base plate 9 by three support rods 10. The support and heater are held together by a sleeve 11 with lugs 13 welded to tabs 14 on the plate 9 and provided with slots 12 to accommodate the arms 4 when the support 5 is placed over the upper end of the sleeve. In a modification the sleeve may be omitted and the support 5 directly ...

Dental X-ray apparatus

Intra-oral dental X-ray apparatus for panoramic dental radiography comprises an electron gun 92 having an elongated tubular target carrier 100 extending therefrom for positioning in the patient's mouth. The carrier 100 supports an inclined target 91 for direction of an X-ray pattern towards a film 95 positioned externally of the patient's mouth. Image definition is improved by a focussing anode 37 which focuses the electron beam 93 into a sharp spot (0.05 to 0.10 mm diameter) on the target 91. The potential on focussing anode 37 is adjustable to vary the size of the spot. An X-ray transmitting ceramic (oxides of Be, Al and Si) window 101 is positioned adjacent the front face of the target. The electron beam can be magnetically deflected to change the X-ray beam direction, Figures 4 and 5. ...

RAY TUBE

DEFLECTING CHARGED PARTICLES

X-RAY TUBE ARRANGEMENT

PYROMETRI TWO-COLORIMETRY OF THE TEMPERATURE OF A ROENTGEN FOCUS

X-RAY TUBE AND VERFARHEN FOR THE REGULATION OF FOCUS CHARACTERISTICS

X-RAY TUBE EQUIPMENT

X-ray tube with glow cathode.

ROENTGENLITHOGRAPHIEGERAET.

X-RAY TUBE WITH VARIABLE ILLUSTRATION SPOT SIZE

DOUBLE FOCUS X-RAY TUBE

HIGH INTENSITY X-RAY SOURCE

LENS-GRID SYSTEM FOR X-RAY GENERATING ELECTRON TUBE

ELECTRON BEAM MULTISTAGE ACCELERATOR DRIVEN PROBE DEVICE

A modular multistage accelerator (102) for use in an X-ray treatment system includes a first 10kV acceleration stage (150) which houses an electron beam gun supplied with -50kV of voltage. The modular multi-stage accelerator includes four additional 10kV stages (112, 114, 116, 118) placed in series with the first stage to achieve a 50kV accelerator overall. Each stage is shielded (190) to prevent stray electrons from being propagated along the length of the drift tube. The triple point within each modular stage is recessed to significantly reduce the emission of stray electrons within each stage. Additionally, the beam current at the X-ray emitting probe of the X-ray source is measured by isolating the beam current to a beam current measuring circuit (220) in electrical connection with a nulling junction node, wherein other currents within the circuit are nulled at the nulling junction node and the beam current flows to the beam current measuring circuit.

VARIABLE X-RAY BEAM MODULATOR FOR WIDE FIELD ANGIOGRAPHY

VARIABLE X-RAY BEAM MODULATOR FOR WIDE-FIELD ANGIOGRAPHY A computer-controlled, motor-driven shutter assembly to be used with the X-ray tube of a large field angiographic system. The shutter assembly installed onto the angiography system enables to compensate for different patient anatomy by reducing the relative X-ray exposure time from the feet to the abdomen of the patient, so as to achieve uniform radiographic exposure, without affecting the X-ray beam hardness. The X-ray exposure time reduction is obtained by gradually masking the X-ray beam during each exposure from the feet to the abdomen, through use of a motor-driven lead shutter. A radiation sensor detects the beginning of every X-ray beam exposure at the upper (leading) port of the large field, X-ray beam tube and in turn, triggers a shutter controlling circuitry. The X-ray exposure time of the patient from feet to abdomen is reduced according to computergenerated attenuation curves and gradients of patient contour. In consequence ...

INTERSTITIAL X-RAY NEEDLE

INTERSTITIAL X-RAY NEEDLE An interstitial X-ray needle includes an elongated X-ray tube coupled to an electron emitter at one end of the tube, with a converter element being disposed at a tip of the other end of the tube for converting emitted electrons into Xrays: a solenoid coil wound around the tube for providing a magnetic field that confines the emitted electrons within a narrow beam; an elongated outer casing enclosing the tube and coil; and a pipe coaxially disposed between the casing and the tube for defining an inner annular flow chamber between the tip of the tube and a coolant inlet in the casing and an outer annular flow chamber between the tip of the tube and a coolant outlet in the casing.

Röntgenröhre.

Glühkathodenröntgenröhre.

Röntgenröhre.

Procedure and tube for the production of X-ray

Tube à rayons X.

Röntgenapparatur.

Spielkreisel.

Verfahren und Einrichtung zum Kontrollieren und Korrigieren der Lage des durch einen Kathodenstrahl erzeugten Brennflecks auf der Antikathode einer Röntgenröhre

An Potentialeinstellmittel angeschlossenes Elektrodensystem zur Erzeugung eines Ladungsträgerstrahles.

Schaltung mit Röntgenröhre mit Strichbrennfleck adjustierbarer Breite.

Röntgenröhre für Fein- und Grobstrukturaufnahmen und Diagnostik.

Röntgenröhre für ein Röntgenschattenmikroskop mit einem elektronenoptischen System und einer Vorrichtung zur Beseitigung von Astigmatismus

Röntgenspektralanalyse-Gerät

Röntgenschattenmikroskop

ROENTGENROEHRENANORDNUNG WITH DREHANODENROEHRE.

Device for irradiating an object with electrons

The device contains an electron beam generator (1) which ensures an electron beam (7) in the form of a ribbon, and a deflection electromagnet (8) having a frame core (9) in order to throw the beam (7) onto the object (6) to be irradiated at an angle of virtually 90 DEG . The deflection electromagnet (8) has two poles (11) which extend over the width of the object (6) to be irradiated, and two windings (12, 13), which surround the poles (11) and are connected to a DC source (14). The deflection electromagnet (8) is arranged in such a manner that the electron paths on the section of the electron beam generator (1) as far as the deflection electromagnet (8) are inclined with respect to the plane of the frame core (9). ...

X-RAY TUBE WITH AN ELECTRON GUN.

Focusing device for an X-ray tube and a thermionic flat electron emitter Wide focusing relationship.

Die vorliegende Erfindung schlägt vor, einen thermionischen Elektronen-Emitter (1) mit flacher Emitterfrontfläche (1a) so anzuordnen, dass dieser über der Kathodenbasisfläche (2a) der Kathode einer Röntgenröhre hervorsteht. Die Kathode besteht lediglich aus dem Fokussiertopf (nicht dargestellt) und dem Kathodenkörper (2). Es sind keine weiteren metallischen Elemente in der Nähe der Emitterfrontfläche (1a) angebracht, welche das elektrische Feld beeinflussen könnten. Diese Anordnung resultiert in hohen Feldstärken auf der gesamten Emitterfrontfläche (1a), so dass im ganzen Arbeitsbereich mögliche Raumladungseffekte vernachlässigt werden können. So können die Parameter Fokusgrösse und Emissionsstrom, durch Veränderung der Gitterspannung und der Emittertemperatur, unabhängig voneinander variiert werden. Zudem ergeben sich grosse Fokussierverhältnisse, und der gesamte Kathodenaufbau lässt sich einfach und wirtschaftlich realisieren.

Cathode system for a Roentgenroehre.

Micro-focus cold cathode focusing structure and method for mounting same

Focusing device for large-beam-current electronic beam targeting X-ray source with micro beams

SPECTROMETER OF ROENTGEN

TUBE A RAYONS X A BALAYAGE

L'INVENTION CONCERNE UN TUBE A RAYONS X A BALAYAGE, DANS LEQUEL EST REALISE UNE DEFLEXION D'UN FAISCEAU D'ELECTRONS F. LE TUBE A RAYONS X 10 SELON L'INVENTION COMPORTE NOTAMMENT UN FILAMENT 2, UN ELEMENT DE CONCENTRATION 3 ADOSSE AU FILAMENT 2 ET UNE CIBLE ANODIQUE 4; LE FILAMENT 2 ET L'ELEMENT DE CONCENTRATION 3 FORMENT UNE CATHODE C1 EMETTANT LE FAISCEAU D'ELECTRONS F. L'ELEMENT DE CONCENTRATION 3 EST CONSTITUE PAR DEUX PIECES METALLIQUES 12, 13 ELECTRIQUEMENT ISOLEES L'UNE DE L'AUTRE ET DU FILAMENT 2. UNE POLARISATION INDEPENDANTE DES DEUX PIECES METALLIQUES 12, 13 PAR RAPPORT AU FILAMENT 2 PERMET D'OBTENIR UNE DEFLEXION DU FAISCEAU D'ELECTRONS F PAR EFFET ELECTROSTATIQUE. L'INVENTION EST APPLICABLE NOTAMMENT AUX INSTALLATIONS DE RADIOLOGIE NUMERIQUE.

SYSTEM TO PRODUCE A FLAT ELECTRONIC BEAM HAS PURELY ELECTROSTATIC FOCUSING IN A TUBE HAS X-RAYS

X-RAY TUBE MULTI-SPECTRAL

APPARATUS AND METHOD FOR GENERATING X-RAYS

Tube with x-rays of great brightness

Tube with x-rays and device intended to make it function

RADIOGENIC TUBE WITH LOW STEM RADIATION

TUBE HAS X-RAYS HAS TRANSVERSE BEAM

Process and apparatus for the starting of diesel engines, special for engines

STUNT DEFLECTION CATHODE RAY TUBE.

Tube roentgen likely to be charged with current for the production of clear radiographies

X-RAY TUBE PROVIDING ELECTROMAGNETIC DEFLECTION.

X-ray tube for imaging by scanning

Assembly of cathode for tubes with x-rays dismountable

X=ray tube with adjustable focal range

X-RAY EMITTING TUBE TO PROVIDE A BEAM OF X-RAYS DISH IN RANGE OF LARGE OPENING AND APPARATUS OF RADIOLOGY COMPRISING SUCH A TUBE

SYSTEM TO PRODUCE A FLAT ELECTRONIC BEAM HAS PURELY ELECTROSTATIC FOCUSING IN A TUBE HAS X-RAYS

Tube radiogène à cathode plane et à chauffage indirect

On résout les problèmes de tenue en température des cathodes en réalisant des cathodes planes en forme de poutre creuse. Ceci leur assure une rigidité inhérente à la forme en poutre, sans leur conférer par ailleurs les inconvénients d'une trop grande inertie thermique.

X-RAY TUBE AND X-RAY SOURCE INCLUDING IT

Ｘ-line pipe

마이크로 채널 플레이트를 구비한 엑스선 튜브

... 본 발명은 엑스선 튜브에 관한 것으로써, 본 발명에 따른 엑스선 튜브는, 전자들이 통과할 수 있는 관통 홀들이 형성된 절연성 기판, 상기 관통 홀의 내 벽면 상에 적층된 이차전자 물질층을 구비한 마이크로 채널들 및 상기 마이크로 채널들이 형성된 상기 절연성 기판의 양면에 각각 전극이 형성되어 게이트 상부에 마이크로 채널 플레이트가 구비되고, 상기 마이크로 채널 플레이트는 그린시트를 적층하는 구조로 이루어진 마이크로 채널을 갖도록 하여 전자 방출 효율을 향상시킬 수 있다.

MULTI-BEAM X-RAY TUBE WHICH CONTROLS THE INTENSITY OF EMISSION CURRENT BY IDENTICALLY MAINTAINING TUBE CURRENT AND FOCAL SIZE OF AN ELECTRONIC BEAM

PURPOSE: A multi-beam X-ray tube is provided to increase amount of emission current by forming a plurality of electronic beams from electron emission units and forming same focus. CONSTITUTION: A cathode unit comprises a plurality of electron emission units which emits an electronic beam. A focusing unit(260) focuses the electronic beam emitted from the plurality of electron emission units to an anode unit(280). The focusing unit forms one side of a concave form. The focusing unit comprises focusing holes in which the electronic beam is passed. A gate unit extracts the electronic beam emitted from the plurality of electron emission units. COPYRIGHT KIPO 2013 [Reference numerals] (260) Focusing unit; (AA,CC) Electron beam; (BB) X-ray ...

Two-3 dimensional beam-forming X- three-ray source

TUBE ELECTRON RAY CRYSTAL HAS LONG PATH

CATHODE ASSEMBLY FOR A LONG THROW LENGTH X-RAY TUBE

Cathode assembly for a long throw length x-ray tube. In one example embodiment, a cathode assembly (200) for an x-ray tube includes an electron emitter (122), an acceleration region (126), and a drift region (124). The electron emitter includes a curved emitting surface configured to emit an electron beam (400) having a y-dimension (408) that is greater than an x-dimension (410) at the electron emitter. The acceleration region is defined adjacent to the electron emitter. The acceleration region is configured such that when the electron beam propagates within the acceleration region, the electron beam accelerates in a z-direction substantially normal to a midpoint of the curved emitting surface. The drift region is defined between the acceleration region and an anode (114). The drift region is configured such that the combined lengths of the drift region and the acceleration region are sufficient for the y-dimension (412) to be less than the x-dimension (414) at the anode.

X-RAYS GENERATOR

When the focus of an X-ray tube in an X-rays generator is to be made extremely small, a first electrode closest to a cathode out of two or more intermediate electrodes (2b, 2c, 2d) arranged between a cathode (2a) and a target (3) must be brought as close as possible to the cathode, and thereby causing the problem of temperature rise of the first electrode. In the invention, even if the thermal capacity of the first electrode is increased by applying the same potential as that of a container (1) to the first electrode to allow it to touch the container, the function of the X-rays generator is not damaged. Positional relation between an electron gun and the container is determined by allowing the first electrode to touch the container, and assembling work of the X-rays generator is facilitated. Furthermore, management of a power supply is facilitated because the potentials of the cathode, the intermediate electrodes (e.g. the second electrode, the third electrode) and the target are all at ...

COMPACT, IONISING RAY-GENERATING SOURCE, ASSEMBLY COMPRISING A PLURALITY OF SOURCES AND METHOD FOR PRODUCING THE SOURCE

The invention relates to a source generating ionising rays, and in particular X-rays, an assembly comprising a plurality of sources and a method for producing the source. The source comprises: · a vacuum chamber (12), · a cathode capable of emitting an electron beam (18) in the vacuum chamber (12), the electron beam (18) developing around an axis (19), and · an anode (76) receiving the electron beam (18) and comprising a target (20) capable of generating ionising radiation (22) from the energy received from the electron beam (18), the ionising radiation (22) being generated towards the outside of the vacuum chamber (12); wherein the anode (76) comprises a cavity (80) in which the electron beam (18) is intended to penetrate to reach the target (20), and the walls (88, 90) of the cavity (80) form a Faraday cage surrounding parasitic ions (91) that can be emitted by the target (20) inside the vacuum chamber (12); at least one getter (92), separate from the walls (88, 90) of the cavity (80) ...

COMPACT E-BEAM SOURCE FOR GENERATING X-RAYS

Various novel apparatuses and methods for generating X-rays are disclosed. One or more e-beam generators are oriented at non-conventional locations with respect to the target of the device.

X-RAY TUBE AND X-RAY SOURCE INCLUDING IT

An X-ray tube equipped with a structure for raising the enlargement ratio of an enlarged perspective image, and an X-ray source including such X-ray tube. The X-ray tube comprises a target containing section (3) containing an X-ray target, and an electron gun containing section (11) having one end fixed to the sidewall of the target containing section. The electron gun containing section is arranged such that its tube axis (C1) intersects the tube axis (C3) of the target containing section. The electron gun containing section holds the electron gun while shifting the center of an electron exit opening of the electron gun to the side of an X-ray exit window provided closer to one end of the sidewall in the target containing section from the tube axis of the electron gun containing section. With such an arrangement, a distance (FOD) between the X-ray exit window and the X-ray target can be shortened while sustaining sufficient output of the electron gun.

DETERMINING WIDTH AND HEIGHT OF ELECTRON SPOT

A method in an X-ray source configured to emit, from an interaction region, X-ray radiation generated by an interaction between an electron beam and a target, the method including the steps of: providing the target; providing the electron beam; deflecting the electron beam along a first direction relative the target; detecting electrons indicative of the interaction between the electron beam and the target; determining a first extension of the electron beam on the target, along the first direction, based on the detected electrons and the deflection of the electron beam; detecting X-ray radiation generated by the interaction between the electron beam and the target; and determining a second extension of the electron beam on the target, along a second direction, based on the detected X-ray radiation.

X-RAY TUBE APERTURE BODY WITH SHIELDED VACUUM WALL

X-ray tube aperture body with shielded vacuum wall. In one example embodiment, an aperture body for use in an x-ray tube having an anode and a cathode includes an electron shield and a vacuum wall. The electron shield is configured to intercept backscattered electrons from the anode. The vacuum wall is separated by a gap from the electron shield and is shielded from the backscattered electrons by the electron shield. The aperture body also includes an electron shield aperture defined in the electron shield and a vacuum wall aperture defined in the vacuum wall through which electrons may pass between the cathode and the anode.

Dual energy imaging with beam blocking during energy transition

A medical imaging method comprising generating a radiation at a first energy level by a radiation source, generating a radiation at a second energy level different from the first energy level by the radiation source, emitting the generated radiations at an output of the radiation source towards a detector, and blocking or diverting the emitted radiations during at least one intermediate phase during which the radiation source switches in a transient way from one of the first energy level and the second energy level to the other of the first energy level and the second energy level.

X-ray tube having magnetic quadrupoles for focusing and magnetic dipoles for steering

An X-ray tube can include: a cathode including an electron emitter; an anode configured to receive the emitted electrons; a first magnetic quadrupole between the cathode and the anode and having a first quadrupole yoke with four first quadrupole pole projections extending from the first quadrupole yoke and oriented toward a central axis of the first quadrupole yoke and each of the four first quadrupole pole projections having a first quadrupole electromagnetic coil; a second magnetic quadrupole between the first magnetic quadruple and the anode and having a second quadrupole yoke with four second quadrupole pole projections extending from the second quadrupole yoke and oriented toward a central axis of the second quadrupole yoke and each of the four second quadrupole pole projections having a second quadrupole electromagnetic coil; and a magnetic dipole between the cathode and anode and having a dipole yoke with four dipole electromagnetic coils.

ELECTRON-EMISSION DEVICE

An X-ray tube of an embodiment includes an anode; and an electron emission device. In an embodiment, the electron emission device includes at least one electron emitter including at least one emission surface and at least one barrier grid, the at least one barrier grid being spaced apart from the at least one emission surface of the electron emitter and includes a definable number of individually controllable grid segments. According to an embodiment, at least one individually definable grid voltage is applicable to each of the grid segments. In a simple manner, an electron-emission device of an embodiment permits the image quality to be adjusted with minimal anode loading.

X-ray generator

Provided is an X-ray generator for generating X-rays from an X-ray focal point that is a region in which electrons emitted from a filament impinge upon a rotating anode. The X-ray generator has a Wehnelt electrode for surrounding the filament, an attachment part formed integrally with the Wehnelt electrode, a pedestal to which the attachment part is attached, and a casing for housing the pedestal and the anticathode. The width of the space in which the anticathode is housed by the casing is less than the width of the space in which the pedestal is housed by the casing. The Wehnelt electrode extends into the space in which the anticathode is housed by the casing, in a state in which the attachment part is attached to the pedestal.

X-ray tube and method to operate an x-ray tube

An x-ray tube has an evacuated, rotatable housing in which are arranged a cathode designed to emit an electron beam and an anode interacting with this cathode, and two quadrupole magnet systems arranged outside of the housing and spaced apart from one another that are provided to influence the electron beam.

X-ray tube cathode with magnetic electron beam steering

An x-ray tube cathode with magnetic electron beam steering. In one example embodiment, an x-ray tube cathode includes a cathode head and an electron emitter. The cathode head includes electrically conductive and non-magnetic material integrated with magnetic material. The cathode head defines an emitter slot in a portion of electrically conductive and non-magnetic material positioned between two portions of magnetic material. The electron emitter is positioned within the emitter slot. The electron emitter is configured to emit a beam of electrons. The beam of electrons is configured to be both focused by the electrically conductive and non-magnetic material and steered during beam formation by the magnetic material.

Electron gun, x-ray generator and x-ray measurement apparatus

An electron gun having: a cathode for emitting electrons; a first Wehnelt electrode equipped with a first aperture through which electrons are allowed to pass; and a second Wehnelt electrode that is equipped with a second aperture disposed at a predetermined position with respect to the cathode and the first aperture, and that is furnished at a position closer to the cathode than the first Wehnelt electrode, wherein: the cathode and the second Wehnelt electrode are included within a single assembly constituting a unitary body; and the assembly is detachably attached to the first Wehnelt electrode. Replacement of the cathode can be performed by detaching the cathode unit from the first Wehnelt electrode, and then ejecting the cathode unit out from the Wehnelt cover. The emitter of the cathode can thereby be reliably positioned with respect to the second aperture.

X-ray generator, x-ray imaging apparatus, and control methods therefor

In an X-ray generator which includes an electron beam generating unit which has a plurality of electron emitters and generates an electron beam corresponding to driven electron emitters, and a target electrode which generates X-rays with the irradiation position of an electron beam generated by the electron beam generating unit being an X-ray focus, the X-ray focus shape formed by a set of X-ray focuses on the target electrode is controlled by individually controlling driving of the plurality of electron emitters.

Photo Emitter X-Ray Source Array (PeXSA)

A photo-emitter x-ray source is provided that includes a photocathode electron source, a laser light source, where the laser light source illuminates the photocathode electron source to emit electrons, and an X-ray target, where the emitted electrons are focused on the X-ray target, where the X-ray target emits X-rays. The photocathode electron source can include alkali halides (such as CsBr and CsI), semiconductors (such as GaAs, InP), and theses materials modified with rare Earth element (such as Eu) doping, electron beam bombardment, and X-ray irradiation, and has a form factor that includes planar, patterned, of optically patterned. The X-ray target includes a material such as tungsten, copper, rhodium or molybdenum. The laser light source is pulsed or steered according to light modulators that can include acousto-optics, mode-locking, micro-mirror array, and liquid crystals, and includes a nano-aperture or nano-particle arrays, where the nano-aperture is a C-aperture or a circular aperture.

COMPUTER TOMOGRAPH

A computer tomograph () for mammographic x-ray imaging includes a MBFEX tube () and a flat-bed x-ray detector (). Cathodes () are arranged in a fixed manner in rows in the MBFEX tube (), the cathodes () being provided for the field emission of electrons. Geometry, radiation density and wavelength range of an x-ray beam (b) can be set. The MBFEX tube () is movable parallel (z) to the flat-bed x-ray detector (). The flat bed x-ray detector () includes a moveable x-ray screen (), the opening of which can be set. Using the x-ray screen (), an imaging area (A) on the detector surface (D) of the flat-bed x-ray detector () can be selected and moved. Compared to conventional computer tomographs having rotating x-ray components, the computer tomograph () has a lighter and more compact design, with which a particularly small focal spot size is achieved. 1. A computer tomograph for mammographic x-ray imaging , comprising: a MBFEX tube and a flat-bed x-ray detector , wherein a plurality of cathodes is arranged in a fixed manner in rows in the MBFEX tube , the cathodes being provided for field emission of electrons , and geometry , radiation density and wavelength range of an x-ray beam (b) are set , the MBFEX tube are movable parallel to the flat-bed x-ray detector , the flat bed x-ray detector comprising a moveable x-ray screen , the opening of the moveable x-ray screen is set , and , using the x-ray screen , an imaging area on a detector surface of the flat-bed x-ray detector is selectable and moveable.2. The computer tomograph according to claim 1 , wherein the cathodes contain carbon nanotubes.3. The computer tomograph according to claim 1 , wherein the cathodes contain nanorods for emitting electrons claim 1 , which contain a substance selected from a group of substances consisting of metal oxides claim 1 , metal sulfides claim 1 , nitrides claim 1 , carbides and silicon.4. The computer tomograph according to claim 1 , wherein the MBFEX tube has a grid device arranged in a ...

X-ray source and x-ray imaging apparatus

An X-ray source (10) for emitting an X-ray beam (101) is proposed. The X- ray source (10) comprises an anode (12) and an emitter arrangement (14) comprising a cathode (16) for emitting an electron beam (15) towards the anode (12) and an electron optics (18) for focusing the electron beam (15) at a focal spot (20) on the anode (12). The X-ray source (10) further comprises a controller (22) configured to determine a switching action of the emitter arrangement (14) and to actuate the emitter arrangement (14) to perform the switching action, the switching action being associated with a change of at least one of a position of the focal spot (20) on the anode (12), a size of the focal spot (20), and a shape of the focal spot (20). The controller (22) is further configured to predict before the switching action is performed, based on the determined switching action, the size and the shape of the focal spot (20) expected after the switching action. Further, the controller (22) is configured to actuate the electron optics (18) to compensate for a change of the size and the shape of the focal spot (20) induced by the switching action

Dynamically Adjustable Focal Spot

Methods for maintaining a specified beam profile of an x-ray beam extracted from an x-ray target over a large range of extraction angles relative to the target. A beam of electrons is generated and directed toward a target at an angle of incidence with respect to the target, with the beam of electrons forming a focal spot corresponding to the cross-section of the electron beam. At least one of a size, shape, and orientation of the electron beam cross-section is dynamically varied as the extraction angle is varied, and the extracted x-ray beam is collimated. Dynamically varying the size, shape or orientation of the electron beam cross-section may be performed using focusing and stigmator coils.

X-ray tube for improving electron focusing

Disclosed is an X-ray tube for improving electron focusing, which allows thermoelectrons emitted from a filament to efficiently reach a target of an X-ray irradiation window. To achieve this, the X-ray tube includes: a thermionic emitter configured to emit thermoelectrons by application of a negative high voltage; a focusing tube configured to focus the thermoelectrons emitted from the thermionic emitter; an X-ray irradiation window configured to irradiate X-rays outside by the thermoelectrons bombarded on a target distributed on the X-ray irradiation window, to generate the X-rays after the thermoelectrons pass through the focusing tube; a tube part including both the thermionic emitter and the focusing tube; and a housing surrounding the tube part, wherein the focusing tube and the housing are configured to have a same potential such that movement directions of the thermoelectrons are directed to the X-ray irradiation window.

X-ray source and method for generating x-ray radiation

The present inventive concept relates to an X-ray source comprising: a liquid target source configured to provide a liquid target moving along a flow axis; an electron source configured to provide an electron beam; and a liquid target shaper configured to shape the liquid target to comprise a non-circular cross section with respect to the flow axis, wherein the non-circular cross section has a first width along a first axis and a second width along a second axis, wherein the first width is shorter than the second width, and wherein the liquid target comprises an impact portion being intersected by the first axis; wherein the x-ray source is configured to direct the electron beam towards the impact portion such that the electron beam interacts with the liquid target within the impact portion to generate X-ray radiation.

HIGH BRIGHTNESS X-RAY REFLECTION SOURCE

An x-ray target, x-ray source, and x-ray system are provided. The x-ray target includes a thermally conductive substrate comprising a surface and at least one structure on or embedded in at least a portion of the surface. The at least one structure includes a thermally conductive first material in thermal communication with the substrate. The first material has a length along a first direction parallel to the portion of the surface in a range greater than 1 millimeter and a width along a second direction parallel to the portion of the surface and perpendicular to the first direction. The width is in a range of 0.2 millimeter to 3 millimeters. The at least one structure further includes at least one layer over the first material. The at least one layer includes at least one second material different from the first material. The at least one layer has a thickness in a range of 2 microns to 50 microns. The at least one second material is configured to generate x-rays upon irradiation by electrons having energies in an energy range of 0.5 keV to 160 keV 1. An x-ray target comprising:a thermally conductive substrate comprising a surface; and a thermally conductive first material in thermal communication with the substrate, the first material having a length along a first direction parallel to the portion of the surface in a range greater than 1 millimeter and a width along a second direction parallel to the portion of the surface and perpendicular to the first direction, the width in a range of 0.2 millimeter to 3 millimeters; and', 'at least one layer over the first material, the at least one layer comprising at least one second material different from the first material, the at least one layer having a thickness in a range of 2 microns to 50 microns, the at least one second material configured to generate x-rays upon irradiation by electrons having energies in an energy range of 0.5 keV to 160 keV., 'at least one structure on or embedded in at least a portion of the ...

Systems and methods for monitoring and controlling an electron beam

An X-ray tube assembly includes an electron beam transport tube, a beam tube protection assembly, and a control module. The electron beam transport tube includes an opening configured for passage of an electron beam, and includes an inner surface bounding the opening along a length of the electron beam transport tube. The beam tube protection assembly includes a plurality of beam protection electrode segments disposed within the opening of the electron beam transport tube and configured to protect the inner surface of the electron beam transport tube from contact with the electron beam. The control module is configured to determine a direction of the electron beam responsive to information received from the beam tube protection assembly.

COMPONENT OR ELECTRON CAPTURE SLEEVE FOR AN X-RAY TUBE AND X-RAY TUBE HAVING SUCH A DEVICE

A component part in a vacuum area of an X-ray tube with an opening through which an electron beam is guided. The component part includes a base body made of a first material, wherein the first material is a metal. Arranged on a surface forming the opening is a second material having an atomic number which is smaller than an atomic number of the first material. A target support is attached to an end of the component part. The target support supports a target which is aligned with a lens diaphragm formed at the end of the component part. The target support has a base body made of a first material which is a metal, and a second material formed on a surface of the base body that is selectively exposed to the electron beam and which extends between the target and the lens diaphragm.

VAPOUR MONITORING

A method for generating X-ray radiation, the method including providing a liquid target in a chamber, directing an electron beam towards the liquid target such that the electron beam interacts with the liquid target to generated X-ray radiation, estimating a number of particles produced from the interaction between the electron beam and the liquid target by measuring a number of positively charged particles in the chamber and eliminating a contribution from scattered electrons to the estimated number of particles, and controlling the electron beam, and/or a temperature in a region of the liquid target in which the electron beam interacts with the target, such that the estimated number of particles is below a predetermined limit. Also, a corresponding X-ray source. 1. A method for generating X-ray radiation , comprising:providing a liquid target in a chamber;directing an electron beam towards said liquid target such that the electron beam interacts with the liquid target to generate X-ray radiation;estimating a number of particles produced from the interaction between the electron beam and the liquid target by measuring a number of positively charged particles in the chamber and eliminating a contribution from scattered electrons to the estimated number of particles by measuring a current generated by the scattered electrons; andcontrolling said electron beam, and/or a temperature in a region of the liquid target in which the electron beam interacts with said target, such that the estimated number of particles is below a predetermined limit.2. The method according to claim 1 , wherein the estimated number of particles produced from the interaction between the electron beam and the liquid target is a measure of a vaporisation rate of the liquid target.3. The method according to claim 1 , wherein the estimated number of particles produced from the interaction between the electron beam and the liquid target is a measure of an amount of liquid target material present as ...

SYSTEMS AND METHODS FOR FOCUS CONTROL IN X-RAYS

A method may include obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays. The method may also include determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device. The method may further include causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter. The focus of the radiation rays may satisfy an operational constraint under the specific value of the focusing parameter. 132-. (canceled)33. A system , comprising:at least one storage device storing executable instructions, and obtaining a feedback of a tube voltage applied to an x-ray radiation source of an x-ray radiation device for generating x-ray radiation rays; and', 'determining, based on the feedback of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the x-ray radiation device, wherein the focusing parameter includes at least one of a focusing voltage or a focusing current;', 'causing the focusing device to shape a focus of the x-ray radiation rays according to the determined value of the focusing parameter, wherein the focus of the x-ray radiation rays satisfies an operational constraint under the specific value of the focusing parameter., 'at least one processor in communication with the at least one storage device, when executing the executable instructions, causing the system to perform operations including34. The system of claim 33 , wherein the at least one processor is further configured to cause the system to perform the operations including:obtaining projection data generated by detecting at least a portion of the x-ray radiation rays by a detector of the x-ray radiation device; andgenerating, based on the projection data, one or more images using an energy imaging technique.35. ...

X-Ray Tube

An x-ray tube with a vacuum housing includes a cathode chamber with a cathode arrangement, an anode chamber with an anode arrangement, and a drift path disposed between the cathode chamber and the anode chamber. The drift path is surrounded by a magnet arrangement. The magnet arrangement is a self-supporting construction.

BALANCING X-RAY OUTPUT FOR DUAL ENERGY X-RAY IMAGING SYSTEMS

An X-ray source () for generating X-ray radiation of first and second energy spectra is proposed, wherein the X-ray intensity imbalance between the first and second energy spectra is reduced as compared to conventional X-ray sources. The reduction of the X-ray intensity imbalance is achieved by configuring a smaller electron impact angle () onto the anode () when the higher tube voltage is applied as compared to when the lower tube voltage is applied. 1. An X-ray source for generating X-ray radiation of first and second energy spectra , the X-ray source comprising:a cathode for emitting an electron beam;an anode for converting the electron beam at least partly into X-ray radiation;electron optics configured to control an impact angle at which electrons of the electron beam impinge onto the anode;a power supply configured to apply first and second tube voltages between the cathode and the anode, the second tube voltage being higher than the first tube voltage; anda control circuitry operably coupled to the electron optics;wherein the control circuitry is configured to control the electron optics such that the electrons of the electron beam impinge at a first mean impact angle onto the anode when the first tube voltage is applied and such that the electrons of the electron beam impinge at a second mean impact angle onto the anode when the second tube voltage is applied; andwherein the second mean impact angle is smaller than the first mean impact angle.2. The X-ray source according to claim 1 , wherein the second mean impact angle at which electrons of the electron beam impinge onto the anode is less than 70 degrees.3. The X-ray source according to claim 1 ,wherein the electrons of the electron beam impinge onto a first surface section of the anode when the first tube voltage is applied and onto a second surface section of the anode when the second tube voltage is applied; andwherein the first surface section overlaps with the second surface section.4. The X-ray ...

X-ray tube ion barrier

In the present invention, a cathode is formed with one or more emitters energized to emit electrons that are accelerated towards an anode or target spaced from the cathode. Between the cathode and the target is disposed an ion barrier electrode defining an aperture therein disposed in alignment with the emitters to enable the electron beam to pass through the electrode. The barrier electrode is operably connected to a voltage supply to positively bias the barrier electrode, and the barrier electrode is shaped to minimize the required supply voltage. This positive voltage bias creates a positive potential barrier across the electrode sufficient to repel positive ions generated by the electron beam, protecting the cathode from contact with the ions and increasing the stability of the focal spot generated by the tube by maintaining the ions within the drift region between the ion barrier and the target.

X-ray source having cooling and shielding functions

Disclosed herein is an X-ray source having cooling and shielding functions. The X-ray source includes an X-ray generation unit ( 100 ) which has one or more insulation columns ( 160 ) and emits X-rays in a vacuum; a cooling unit ( 180 ) which is provided around a periphery of the X-ray generation unit and removes heat generated from the X-ray generation unit; and a shielding unit ( 190 ) which is provided around a periphery of the cooling unit and shields an area exposed to X-rays other than the areas related to the emission of the X-rays.

METHOD FOR CONTROLLING AN X-RAY SOURCE

A method for controlling an X-ray source configured to emit, from an X-ray spot on a target, X-ray radiation generated by an interaction between an electron beam and the target, wherein the X-ray spot is determined by the field of view of an X-ray optical system of the X-ray source. The method includes providing the target, providing the electron beam forming an electron spot on the target and interacting with the target to generate X-ray radiation, and adjusting a width and total power of the electron beam such that a maximum of the power density profile in the electron spot is below a predetermined limit, and such that a total power delivered to the target in the X-ray spot is increased. 113-. (canceled)14. A method for controlling an X-ray source configured to emit , from an X-ray spot on a target , X-ray radiation generated by an interaction between an electron beam and the target , wherein the X-ray spot is determined by the field of view of an X-ray optical system of the X-ray source , the method comprising the steps of:providing a liquid jet forming the target;providing the electron beam accelerated by an acceleration voltage, forming an electron spot focused on the target by means of a focus current, and arranged to interact with the target to generate X-ray radiation;determining a scale factor for the acceleration voltage and the focus current relating a deflection current to a displacement of the electron beam relative to the target;measuring a quantity indicative of an interaction between the electron beam and the target for a range of displacements of the electron beam;calculating a power density profile of the electron beam based on the quantity;adjusting a width and a total power of the electron beam such that a maximum of the power density profile thereby obtained in the electron spot is below a predetermined limit, and such that a total power delivered to the target in the X-ray spot is increased.15. The method according to claim 14 , wherein the ...

ANODE TARGET, RAY LIGHT SOURCE, COMPUTED TOMOGRAPHY DEVICE, AND IMAGING METHOD

An anode target, a ray light source, a computed tomography device, and an imaging method, which relate to the technical field of ray processing. The anode target comprises a first anode target, a second anode target, and a ceramic plate. The first anode target is used for enabling, by means of a first voltage carried on the first anode target, an electron beam emitted by a cathode to generate a first ray on a target spot of the first anode target. The second anode target is used for enabling, by means of a second voltage carried on the second anode target, an electron beam emitted by the cathode to generate a second tray on a target spot of the second anode. The ceramic plate is used for isolating the first anode target from the second anode target. By means of the anode target, the ray light source, the computed tomography device and the imaging method, dual-energy distributed ray imaging data can be provided and the imaging quality of a ray system can be improved. 1. An anode target , comprising:a first anode target, configured to cause, by a first voltage carried thereon, electron beams emitted from cathodes to generate first rays on target spots of the first anode target;a second anode target, configured to cause, by a second voltage carried thereon, the electron beams emitted from the cathodes to generate second rays on target spots of the second anode target; anda ceramic body, configured to isolate the first anode target from the second anode target.2. The anode target of claim 1 , further comprising:a cooling oil tube, configured to cool the first anode target and the second anode target; anda shielding layer, configured to shield the rays generated by the anode target.3. The anode target of claim 1 , wherein the ceramic body comprises metallized ceramic body.4. The anode target of claim 3 , wherein the first anode target claim 3 , the second anode target claim 3 , and the metallized ceramic body are connected by gold-copper welding.5. The anode target of ...

DISTRIBUTED X-RAY LIGHT SOURCE AND CONTROL METHOD THEREFOR, AND CT EQUIPMENT

A distributed X-ray light source comprises: a plurality of arranged cathode assemblies used for emitting electron beams; an anode target used for receiving the electron beams emitted by the cathode assemblies; and compensation electrodes and focusing electrodes provided in sequence between the plurality of the cathode assemblies and the anode target, the compensation electrode being used for adjusting electric field strength at two ends of a grid structure in each cathode assembly, and the focusing electrode being used for focusing the electron beams emitted by the cathode assemblies, wherein the focusing electrode corresponding to at least one cathode assembly in the plurality of the cathode assemblies comprises a first electrode and a second electrode which are separately provided, and an electron beam channel is formed between the first electrode and the second electrode. 1. A distributed X-ray light source , comprising:a plurality of arranged cathode assemblies, configured to emit electron beams;an anode target, configured to receive the electron beams emitted by the cathode assemblies; andcompensation electrodes and focusing electrodes provided in sequence between the plurality of the cathode assemblies and the anode target, the compensation electrodes being configured to adjust electric field strength between two ends of a grid structure in each cathode assembly, and the focusing electrodes being configured to focus the electron beams emitted by the cathode assemblies;wherein the focusing electrode corresponding to at least one cathode assembly in the plurality of the cathode assemblies includes a first electrode and a second electrode which are provided separately, and an electron beam channel is formed between the first electrode and the second electrode.2. The distributed X-ray light source according to claim 1 , wherein the focusing electrode corresponding to each of the at least one cathode assembly is disposed separately.3. The distributed X-ray light ...

Target for x-ray generation and x-ray generation device

A target for X-ray generation includes a substrate, a first X-ray target portion formed on an upper surface of the substrate, and a second X-ray target portion formed at a position surrounding the first X-ray target portion in the upper surface of the substrate, while being spaced from an outer edge of the first X-ray target portion.

X-ray tube

According to one embodiment, an x-ray tube includes a cathode and an anode. The cathode includes a filament coil and a focusing electrode that includes a valley bottom part, a first inclined plane rising from the valley bottom part and inclined in the direction of the anode, a first focusing groove, and a first receiving groove. The anode includes a target surface. θ 1>0°. The filament coil, the first receiving groove, and the first focusing groove are positioned more to a third extended line side than a first reference plane. One end part of the first receiving groove is closer to the first reference plane than the other end part.

X-RAY GENERATOR

To achieve high quality x-ray imaging, it is important to be able to control the production of x-rays in an x-ray generator. This is achieved by an x-ray generator comprising an array of electron field emitters for producing paths of electrons, target material comprising x-ray photon producing material configured to emit x-ray photons in response to the incidence of produced electrons upon it, an array of magnetic-field generators for affecting the paths of the produced electrons from the array of electron field emitters such that one or more paths are divertable away from the x-ray photon producing material so as to reduce the production of x-ray photons by the said one or more paths of electrons, the generator further comprising a sensing circuit arranged to measure the amount of electrical charge emitted by one or more electron emitter, and a controller for controlling the array of magnetic-field generators in response to the amount of electrical charge measured. 1. An x-ray generator comprising an array of electron field emitters for producing paths of electrons , target material comprising x-ray photon producing material configured to emit x-ray photons in response to the incidence of produced electrons upon the target material , an array of magnetic-field generators for affecting the paths of the produced electrons from the array of electron field emitters such that one or more of the paths are divertable away from the x-ray photon producing material so as to reduce the production of x-ray photons by the said one or more paths of electrons , the generator further comprising a sensing circuit arranged to measure the amount of electrical charge emitted by the electron field emitters , and a controller for controlling the array of magnetic-field generators in response to the amount of electrical charge measured.2. The x-ray generator of claim 1 , wherein the controller is arranged to control one or more magnetic-field generators to thereby reduce production of x- ...

X-RAY GENERATION DEVICE AND X-RAY IMAGE CAPTURE SYSTEM

An X-ray generation device includes a cathode including an electron source generating an electron beam, an anode including a target to transmit an X-ray generated by collision of the electron beam, and a convergence electrode converging the electron beam toward the target. The target has a first region having a locally small thickness and a second region having a larger thickness than the first region. The X-ray generation device further includes a deflection unit to switch an incident position of the electron beam between the first region and the second region. The deflection unit has an adjustment mode to adjust an X-ray focal spot diameter and an X-ray generation mode to generate an X-ray, the electron beam is caused to enter the first region in the adjustment mode, and the electron beam is caused to enter the second region in the X-ray generation mode. 1. An X-ray generation device comprising: a cathode including an electron source that generates an electron beam; an anode including a transmission type target configured to transmit , in an incident direction of the electron beam , an X-ray generated by collision of the electron beam; and a convergence electrode that converges the electron beam toward the transmission type target ,wherein the transmission type target has a first region having a locally small thickness and a second region having a larger thickness than the first region,wherein the X-ray generation device further comprises an electron beam deflection unit configured to switch an incident position of the electron beam to the transmission type target between the first region and the second region, andwherein the electron beam deflection unit has an adjustment mode to adjust an X-ray focal spot diameter and an X-ray generation mode to generate an X-ray, the electron beam is caused to enter the first region in the adjustment mode, and the electron beam is caused to enter the second region in the X-ray generation mode.2. The X-ray generation device ...

Cathode head with multiple filaments for high emission focal spot

In some example embodiments, a cathode for an X-ray tube may include a first electron emitter and a second electron emitter spaced apart from the first electron emitter. The cathode may include a cathode body defining a first recess and a second recess. The first recess may have the first electron emitter positioned at least partially therein and the second recess may have the second electron emitter positioned at least partially therein. The second electron emitter may extend further out of the second recess than the first electron emitter extends out of the first recess. The first electron emitter and the second electron emitter may be configured to simultaneously direct electrons to a target on an anode.

COMPACT SOURCE FOR GENERATING IONIZING RADIATION, ASSEMBLY COMPRISING A PLURALITY OF SOURCES AND PROCESS FOR PRODUCING THE SOURCE

A source for generating ionizing radiation and in particular x-rays, to an assembly includes a plurality of sources and to a process for producing the source. The source for generating ionizing radiation comprises: a vacuum chamber; a cathode that is able to emit an electron beam into the vacuum chamber; an anode that receives the electron beam and that comprises a target that is able to generate ionizing radiation from the energy received from the electron beam; and an electrode that is placed in the vicinity of the cathode and forming a wehnelt. The electrode is formed from a conductive surface adhering to a concave face of a dielectric. 2. The source according to claim 1 , wherein it comprises a mechanical part that is made from the dielectric claim 1 , and that comprises the concave face.3. The source according to claim 2 , wherein the conductive surface is formed from a metal deposit placed on the concave face.4. The source according to claim 2 , wherein the mechanical part comprises an internal face having a surface resistivity comprised between 1×10Ω·square and 1×10Ω·square.5. The source according to claim 1 , wherein the dielectric is formed from a nitride-based ceramic.6. The source according to claim 4 , wherein the surface resistivity of the internal face is obtained by depositing a semiconductor on the dielectric of the mechanical part.7. The source according to claim 4 , wherein the surface resistivity of the internal face is obtained by adding to the volume of the nitride-based ceramic a material allowing the intrinsic resistivity of the nitride-based ceramic to be decreased.8. The source according to claim 1 , wherein the cathode emits the electron beam via a field effect and in that the electrode is placed in contact with the cathode.9. The source according to claim 2 , wherein the mechanical part forms a holder of the cathode.10. The source according to claim 2 , wherein the mechanical part forms a portion of the vacuum chamber.11. The source ...

X-RAY TUBE

According to one embodiment, an X-ray tube includes an anode target, a cathode including a first filament and a converging electrode, and a vacuum envelope. The converging electrode includes a flat front surface, a flat first surface, a first groove portion, and a pair of first protruding portions. The pair of first protruding portions are formed to protrude from the first surface toward the front surface and sandwich the first groove portion in a first length direction. An upper surface is formed of a plurality of flat inclined surfaces. 1. An X-ray tube comprising:an anode target emitting X-rays by electrons made incident thereon;a cathode comprising a first filament emitting electrons and a converging electrode urging the electrons emitted from the first filament to be converged; anda vacuum envelope accommodating the anode target and the cathode,whereinthe converging electrode comprises:a flat front surface which is the closest to the anode target;a flat first surface located on a side opposite to the anode target with respect to the front surface;a first trench portion opening to the first surface, accommodating the first filament, and having a first length direction along a longer axis of the first filament; anda pair of first protruding portions formed to protrude from the first surface toward the front surface side and sandwiching the first trench portion in the first length direction, andan upper surface of each of the first protruding portions on a side opposed to the anode target is formed of a plurality of flat inclined surfaces inclined in directions different from one another.2. The X-ray tube of claim 1 , wherein the pair of first protruding portions have first side surfaces opposed to each other in the first length direction.3. The X-ray tube of claim 2 , wherein the first trench portion has a first width direction perpendicular to each of the first depth direction and the first length direction of the first trench portion claim 2 , andeach of the ...

Aligning and focusing an electron beam in an x-ray source

A technique for indirectly measuring the degree of alignment of a beam in an electron-optical system including aligning means, focusing means and deflection means. To carry out the measurements, a simple sensor may be used, even a single-element sensor, provided it has a well-defined spatial extent. When practiced in connection with an X-ray source which is operable to produce an X-ray target, further, a technique for determining and controlling a width of an electron-beam at its intersection point with the target.

X-ray tube having planar emitter and magnetic focusing and steering components

An X-ray tube can include: a cathode including an electron emitter that emits an electron beam; an anode configured to receive the emitted electrons of the electron beam; a first magnetic quadrupole between the cathode and the anode; a second magnetic quadrupole between the first magnetic quadrupole and the anode; a magnetic dipole between the cathode and anode; and a power supply system operably coupled with the first magnetic quadrupole, second magnetic quadrupole, and magnetic dipole, the power supply system being configured to: produce a first focusing magnetic quadrupole field at the first magnetic quadrupole; produce a second focusing magnetic quadrupole field at the second magnetic quadrupole; and produce a steering magnetic dipole field at the magnetic dipole configured to deflect the electron beam in order to shift a focal spot of the electron beam on the anode.

X-RAY TUBE

Provided is an X-ray tube capable of obtaining a clear X-ray image by reducing unnecessary X-rays radiated from a holder shaft. The X-ray tube includes an electron source for generating an electron beam B, an anode for accelerating the electron beam B and having a hole allowing the electron beam B to pass through, a cylindrical holder shaft forming a passage for allowing the electron beam B to pass through a hole of the anode , a magnetic lens arranged around the holder shaft and configured to converge the electron beam B, a target holder connected to the holder shaft , a target arranged in the target holder so that the electron beam B collides with the target , and an irradiation window arranged in the target holder and configured to extract X-rays generated from the target to the outside. The inner wall of the holder shaft is made of a carbon material to reduce X-rays generated when the electron beam B hits the holder shaft 1. An X-ray tube comprising:an electron source configured to generate an electron beam;an anode configured to accelerate the electron beam and having a hole allowing the electron beam B to pass through;a cylindrical holder shaft configured to form a passage which allows the electron beam B to pass through the hole of the anode;a magnetic lens arranged around the holder shaft and configured to converge the electron beam;a target holder connected to the holder shaft;a target arranged in the target holder so that the electron beam collides with the target; andan irradiation window arranged in the target holder for extracting X-rays generated from the target to an outside,wherein an inner wall of the holder shaft is made of a carbon material.2. The X-ray device as recited in claim 1 ,wherein a carbon content rate of the carbon material is 99.9% or more.3. The X-ray device as recited in claim 1 ,wherein the carbon material is graphite having thermal anisotropy, andwherein a good thermal conduction direction is directed in an axial direction of the ...

X-ray unit

The invention relates to an X-ray unit, an X-ray system, and a method for manufacturing an X-ray system. The X-ray system comprises an X-ray unit, a cathode, and an anode. The X-ray unit comprises a vacuum tube and a magnet system. The vacuum tube is configured to encase a cathode, an anode, and a drift way for an electron beam moving between the cathode and the anode. The magnet system is configured to focus the electron beam and the magnet system is fused to the vacuum tube.

COMPACT X-RAY DEVICES, SYSTEMS, AND METHODS FOR TOMOSYNTHESIS, FLUOROSCOPY, AND STEREOTACTIC IMAGING

Compact x-ray devices, systems, and methods for capturing in tomosynthesis, two-dimensional radiography, fluoroscopy, and stereotactic imaging modes. In some embodiments, the compact x-ray imaging system includes an x-ray source array including spatially distributed x-ray focal spots and a digital area x-ray detector. In some embodiments, the imaging system includes an electronic switching device configured to alternate the imaging mode of the system. In some embodiments, the imaging system includes a mechanical support configured to enable a position and orientation of the x-ray source array and the digital area x-ray detector to be adjusted such that both upper and lower extremities of a patient can be imaged using various imaging modes while a position of the plurality of spatially distributed x-ray focal spots with respect to the digital area x-ray detector remains unchanged. 1. A compact x-ray imaging system , comprising:an x-ray source array comprising a plurality of spatially distributed x-ray focal spots and a digital area x-ray detector;a collimation assembly connected to an exit window of the x-ray source array configured to substantially collimate x-ray radiation generated from each of the plurality of spatially distributed x-ray focal spots to a surface of the digital area x-ray detector; a high voltage power supply;', 'a current source;', 'a switch configured to sequentially connect the current source to a plurality of field emission cathodes of the compact x-ray imaging device, with a pre-set current value, one at a time, to produce one or more projection images for tomosynthesis reconstruction without any mechanical motion of either the x-ray source array or the digital area x-ray detector; and', 'a trigger comprising one or more first processors and/or circuitry configured to synchronize detector data collection with x-ray exposure from the plurality of spatially distributed x-ray focal spots; and, 'an electronic switching device comprisinga ...

X-ray tube device

An X-ray tube device according to the present invention includes a cathode generating an electron beam, an anode generating an X-ray by collision of the electron beam from the cathode, an envelope internally housing the cathode and the anode, a magnetic field generator including a magnetic pole arranged to be opposed to the envelope, generating a magnetic field for focusing and deflecting the electron beam from the cathode to the anode, and an electric field relaxing electrode arranged between the magnetic pole and the envelope, having an outer surface having a rounded shape. Thus, the magnetic field generator can be placed closer to the envelope while a tip end of the magnetic field generator is suppressed from being a discharge start point, and hence the effect of being capable of downsizing the X-ray tube device is achieved.

X-ray diagnostic imaging apparatus, monitoring server and anomaly detection method

In order to provide an X-ray diagnostic imaging apparatus which can detect anomalies caused by factors other than wearing of a bearing of an X-ray tube, according to the present invention, there is provided an X-ray diagnostic imaging apparatus including an X-ray tube that irradiates an object with X-rays, an X-ray detector that detects X-rays having been transmitted through the object, an image creation unit that creates a medical image of the object on the basis of the output of the X-ray detector, a change amount measurement unit that measures a change amount of an X-ray focal point which is an X-ray generation point of the X-ray tube, and an anomaly detection unit that detects an anomaly in the X-ray tube on the basis of whether or not the change amount falls within a predetermined normal change range.

ON-CHIP MINIATURE X-RAY SOURCE AND MANUFACTURING METHOD THEREFOR

An on-chip miniature X-ray source, comprising: an on-chip miniature electron source (); a first insulating spacer () located on one side of the on-chip miniature electron source () emitting electrons, the first insulating spacer () being of a cavity structure; and an anode () located on the first insulating spacer (), a closed vacuum cavity being formed between the on-chip miniature electron source () and the anode (). The on-chip miniature electron source can be obtained by means of a micromachining technique, further reducing the size thereof, and reducing the manufacturing costs. The on-chip miniature X-ray source has the advantages of stable X-ray dose, low operation vacuum requirement, fast switch response, integrated and mass processing, etc. and can be used in various types of small and portable X-ray detection, analysis and treatment devices. 1. An on-chip miniature X-ray source , comprising:an on-chip miniature electron source;a first insulating spacer provided on an electron-emitting side of the on-chip miniature electron source, wherein the first insulating spacer has a cavity structure; andan anode provided on the first insulating spacer,wherein a closed vacuum cavity is formed between the on-chip miniature electron source and the anode.2. The on-chip miniature X-ray source according to claim 1 , wherein the on-chip miniature electron source comprises:a substrate;a resistive-switching material film layer covering a surface of the substrate; andat least one electrode pair provided on the resistive-switching material film layer, wherein the at least one electrode pair comprises a first electrode and a second electrode, and there is a gap between the first electrode and the second electrode,wherein a tunnel junction is formed within a region of the resistive-switching material film layer under the gap.3. The on-chip miniature X-ray source according to claim 2 , wherein the at least one electrode pair comprises a plurality of interdigital electrode pairs.4. ...

Electron-Beam Spot Optimization

Electron beam spot characteristics can be tuned in each x-ray tube by moving a focusing-ring along a longitudinal-axis of the x-ray tube. The focusing-ring can then be immovably fastened to the x-ray tube. An x-ray source can include an x-ray tube and a focusing-ring. The focusing-ring can at least partially encircle an electron-emitter, a cathode, an evacuated-enclosure, or combinations thereof. The focusing-ring can be located outside of a vacuum of the evacuated enclosure. The focusing-ring can adjust an electron-beam spot on a target material of the x-ray tube when moved along a longitudinal-axis extending linearly from the electron-emitter to the target material.

METHOD AND SYSTEM FOR ADJUSTING FOCAL POINT POSITION

The present disclosure relates to a method and system for adjusting a focal point position of an X-ray tube. The method may include: obtaining a first thermal capacity and a first position of a focal point of an X-ray tube; obtaining a second thermal capacity of the X-ray tube; determining a second position of the focal point the X-ray tube based on the second thermal capacity; determining a target grid voltage difference of a focusing cup of the X-ray tube based on the first position and the second position of the focal point; and adjusting the X-ray tube based on the target grid voltage difference. 120-. (canceled)21. A method implemented on at least one device including at least one processor and at least one computer-readable storage medium , the method comprising:obtaining a relationship between a thermal capacity of an anode of an X-ray tube and a grid voltage difference of a focusing cup of the X-ray tube;obtaining a working thermal capacity of the anode of the X-ray tube;determining a target grid voltage difference of the focusing cup of the X-ray tube based on the working thermal capacity and the relationship, wherein the target grid voltage difference is a difference between a first grid voltage of a first section of the focusing cup and a second grid voltage of a second section of the focusing cup; andadjusting the grid voltage difference of the focusing cup based on the target grid voltage difference.221. The method of claim , wherein the obtaining a relationship between a thermal capacity of an anode of an X-ray tube and a grid voltage difference of a focusing cup of the X-ray tube comprises:obtaining a first relationship between a position of a focal point of the X-ray tube and the thermal capacity of the anode of the X-ray tube;obtaining a second relationship between the grid voltage difference of the focusing cup of the X-ray tube and the position of the focal point; anddetermining, based on the first relationship and the second relationship, the ...

MBFEX TUBE

A MBFEX tube () for an x-ray device comprises, in a vacuum tube (), an anode () designed as a cooling finger and securely arranged in the vacuum tube, and a plurality of securely arranged cathodes (), wherein the vacuum tube () comprises a plurality of cathode feed lines () and no more than two high-voltage bushings (), in a high-voltage bushing () a coolant pipe () is passed through by an internal coolant inner pipe (), the coolant pipe () and the coolant inner pipe () are provided for cooling the anode () with a liquid coolant, the cathodes () are provided for field emission of electrons and are arranged on the anode () for generating x-ray sources (Q). 1. A multibeam field emission X-ray (MBFEX) tube for an x-ray device which comprises , in a vacuum tube ,an anode designed as a cooling finger and securely arranged in the vacuum tube, and 'the coolant pipe and the coolant inner pipe are provided for cooling the anode with a liquid coolant, the cathodes are provided for field emission of electrons and are in each case oriented toward the anode for generating x-ray sources.', 'wherein the vacuum tube comprises a plurality of cathode feed lines and no more than two high-voltage bushings, in a high-voltage bushing a coolant pipe is passed through by an internal coolant inner pipe,'}, 'a plurality of securely arranged cathodes,'}2. The MBFEX tube of claim 1 , wherein the cathode feed lines and the high-voltage bushings are arranged in a row and lying opposite the anode on the vacuum tube.3. The MBFEX tube of claim 2 , wherein the x-ray sources are arranged in a row arrangement on the anode.4. The MBFEX tube of claim 3 , wherein the x-ray sources are each located on a surface section of the anode which is slanted with respect to the center axis of the anode.5. The MBFEX tube of claim 4 , wherein the slanted surface sections are formed by at least one of projections of the anode or ground sections in the anode.6. (canceled)7. The MBFEX tube of claim 5 , wherein the ...

System And Method For Calibration Of An X-Ray Tube

A system and method for calibrating an X-ray tube is provided in which the X-ray tube includes an electronic storage medium associated with the X-ray tube on which calibration information for the X-ray tube is stored. The calibration information includes operating parameters for the focusing elements of the X-ray tube for desired focal spots, tolerance limits for variations in the focal spots and a number of gradient coefficient values corresponding to certain modulation transfer functions (MTF) for the X-ray tube that the imaging system can employ in an iterative manner to correct the operating parameters of the focusing elements to achieve the desired focal spot. This automatic iterative process significantly reduces the time required for the calibration of the X-ray tube. The system and method also employs scan sequencing to minimize the heat generated enabling the scans to be completed in a shorter amount of time than prior calibration processes. 1. A method for the calibration of an X-ray tube comprising the steps of:providing original parameters of operation for a first number of focal spots, the original parameters including values for X-ray tube voltage, X-ray tube emission, operating currents and linearized focal spot size functions and gradients therefor;operating the X-ray tube at the original parameters;determining values for any offsets in the original parameters; andupdating the original parameters to provide updated parameters for the first number of focal spots.2. The method of wherein X-ray tube includes magnetic focusing elements and wherein the original parameters include operating currents for the magnetic focusing elements.3. The method of wherein the offsets include a global magnet offset current value.4. The method of wherein the original parameters of operation are generated during production of the X-ray tube.5. The method of wherein the first number of focal spots comprises at least six focal spots.6. A method of calibrating an X-ray tube ...

High brightness x-ray absorption spectroscopy system

This disclosure presents systems for x-ray absorption fine structure (XAFS) measurements that have x-ray flux and flux density several orders of magnitude greater than existing compact systems. These are useful for laboratory or field applications of x-ray absorption near-edge spectroscopy (XANES) or extended x-ray fine absorption structure (EXFAS) spectroscopy. The higher brightness is achieved by using designs for x-ray targets that comprise a number of aligned microstructures of x-ray generating materials fabricated in close thermal contact with a substrate having high thermal conductivity. This allows for bombardment with higher electron density and/or higher energy electrons, leading to greater x-ray brightness and high flux. The high brightness x-ray source is then coupled to an x-ray reflecting optical system to collimate the x-rays, and a monochromator, which selects the exposure energy. Absorption spectra of samples using the high flux monochromatic x-rays can be made using standard detection techniques.

Reflection type x-ray tube

This invention relates to an X-ray tube, and more specifically, relates to a reflection type X-ray tube which enables thermoelectrons emitted from filament to reach a target of an X-ray irradiation window more efficiently.

SYSTEMS AND METHODS FOR FOCUS CONTROL IN X-RAYS

A method may include obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays. The method may also include determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device. The method may further include causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter. The focus of the radiation rays may satisfy an operational constraint under the specific value of the focusing parameter. 1. A system , comprising:at least one storage device storing executable instructions, and obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays; and', 'determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device;', 'causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter, wherein the focus of the radiation rays satisfies an operational constraint under the specific value of the focusing parameter., 'at least one processor in communication with the at least one storage device, when executing the executable instructions, causing the system to perform operations including2. The system of claim 1 , wherein the at least one processor is further configured to cause the system to perform the operations including:generating, based on at least a portion of the radiation rays detected by a detector of the radiation device, one or more images using an energy imaging technique.3. The system of claim 1 , wherein the operational constraint includes that a size of the focus of the radiation rays is in a range when the tube voltage changes according to a reference ...

ELECTROMAGNETIC X-RAY CONTROL

Disclosed herein is an apparatus for electromagnetic x-ray control. The apparatus comprises a thermionic filament, positioned at a first end of a micro-focus x-ray tube and configured to generate an electron stream. The apparatus also comprises an x-ray generation target, positioned within the micro-focus x-ray tube at a second end of the micro-focus x-ray tube, opposite the first end, to receive the electron stream and to generate x-rays in response to the electron stream impinging on the x-ray generation target. The apparatus further comprises an electromagnetic field element, configured to generate an electromagnetic field that receives the electron stream and operable to vary the electromagnetic field to redirect the electron stream, within the micro-focus x-ray tube, to impinge on the x-ray generation target at variable locations on the x-ray generation target. Each one of the variable locations corresponds to a different one of multiple variations of the electromagnetic field. 1. An apparatus for electromagnetic x-ray control , comprising:a thermionic filament, positioned at a first end of a micro-focus x-ray tube and configured to generate an electron stream;an x-ray generation target, positioned within the micro-focus x-ray tube at a second end of the micro-focus x-ray tube, opposite the first end, to receive the electron stream and to generate x-rays in response to the electron stream impinging on the x-ray generation target; andan electromagnetic field element, configured to generate an electromagnetic field that receives the electron stream and operable to vary the electromagnetic field to redirect the electron stream, within the micro-focus x-ray tube, to impinge on the x-ray generation target at variable locations on the x-ray generation target, with the variable locations corresponding to different variations of the electromagnetic field.2. The apparatus of claim 1 , further comprising a focusing anode positioned to focus the electron stream within the ...

X-RAY TUBE AND CATHODE CUP WITH DEPOSITION SHIELD

An x-ray tube includes an electron emitter and a cathode cup having a recess that holds the electron emitter. The recess has a bottom surface, and a shield is positioned in the recess between the electron emitter and the bottom surface. The shield is configured to receive deposited sublimated emitter material and to maintain the sublimated emitter material away from the electron emitter. 1. An x-ray tube comprising:an electron emitter;a cathode cup having a recess that holds the electron emitter, the recess having a bottom surface;a shield positioned in the recess between the electron emitter and the bottom surface, wherein the shield is configured to receive deposited sublimated emitter material and to maintain the sublimated emitter material away from the electron emitter; andwherein the shield is comprised of a refractory metal material having a coefficient of thermal expansion that is equivalent to that of the sublimated emitter material.2. (canceled)3. (canceled)4. The x-ray tube of claim 1 , wherein the shield is held within the cathode cup by at least one mechanical fixation means.5. The x-ray tube of claim 4 , wherein the mechanical fixation means includes at least one of a clip claim 4 , a screw claim 4 , a tack claim 4 , a weld claim 4 , a rivet claim 4 , a friction fitting claim 4 , and a ledge or a groove in a sidewall of the recess.6. The x-ray tube of claim 1 , wherein the shield is one of a mesh or a foil mechanically attached to the cathode cup.7. The x-ray tube of claim 6 , wherein the shield is a tungsten mesh.8. The x-ray tube of claim 6 , wherein the shield is a tungsten foil.9. The x-ray tube of claim 1 , wherein the cathode cup includes at least one groove on a sidewall of the recess claim 1 , and wherein shield is inserted into the groove and is held in place within the recess by the groove.10. The x-ray tube of claim 9 , wherein the shield is a flat mesh sheet or a flat foil sheet inserted into the groove.11. The x-ray tube of claim 1 , ...

HIGH BRIGHTNESS X-RAY REFLECTION SOURCE

An x-ray target, x-ray source, and x-ray system are provided. The x-ray target includes a thermally conductive substrate comprising a surface and at least one structure on or embedded in at least a portion of the surface. The at least one structure includes a thermally conductive first material in thermal communication with the substrate. The first material has a length along a first direction parallel to the portion of the surface in a range greater than 1 millimeter and a width along a second direction parallel to the portion of the surface and perpendicular to the first direction. The width is in a range of 0.2 millimeter to 3 millimeters. The at least one structure further includes at least one layer over the first material. The at least one layer includes at least one second material different from the first material. The at least one layer has a thickness in a range of 2 microns to 50 microns. The at least one second material is configured to generate x-rays upon irradiation by electrons. 1. An x-ray target comprising:a thermally conductive substrate comprising a surface; and a thermally conductive first material in thermal communication with the substrate; and', 'at least one layer over the first material, the at least one layer comprising at least one second material different from the first material, the at least one second material configured to generate x-rays upon irradiation by electrons., 'a plurality of structures separate from one another and on or embedded in at least a portion of the surface, each of at least two structures of the plurality of structures comprising2. The x-ray target of claim 1 , wherein the first material of each of the at least two structures extends along a direction parallel to the portion of the surface by a distance in a range of 0.2 millimeter to 3 millimeters.3. The x-ray target of claim 1 , wherein the first material of each of the at least two structures extends along a direction parallel to the portion of the surface by ...

DOSE MODULATION

A method, in an embodiment, is for setting an X-ray intensity using a structured anode or a field emitter cathode or a finger-shaped cathode head. Other embodiments include an associated X-ray device, an associated single X-ray tube CT scanner, an associated dual X-ray tube CT scanner, and an associated computer program product. 1. A method for setting an X-ray intensity using a structured anode , comprising:providing an X-ray tube including a structured anode, the structured anode including a first anode microstructure and a second anode microstructure;providing, in a controller, a first X-ray intensity number according to the first anode microstructure and a second X-ray intensity number according to the second anode microstructure;determining a first X-ray intensity setpoint in the controller according to a patient undergoing an imaging scan;selecting, in the controller, the first X-ray intensity number or the second X-ray intensity number as a first setpoint X-ray intensity number, according to the first X-ray intensity setpoint determined; andaligning an electron beam of the X-ray tube to the first anode microstructure or to the second anode microstructure according to the first setpoint X-ray intensity number selected for generating the X-rays, thereby setting the X-ray intensity.2. The method of claim 1 , wherein a second X-ray intensity setpoint is determined in the controller according to the patient undergoing the imaging scan claim 1 , wherein a second setpoint X-ray intensity number is selected according to the second X-ray intensity setpoint in the controller claim 1 , and wherein the electron beam of the X-ray tube is re-aligned to the first anode microstructure or to the second anode microstructure according to the second setpoint X-ray intensity number selected.3. The method of claim 2 , wherein the electron beam is re-aligned according to the second setpoint X-ray intensity number selected within an electron beam aligning time of less than 1 s after ...

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

X-ray source and x-ray system

An x-ray source has multiple electron sources spaced apart from each other along a longitudinal direction that is defined as being parallel to the rotation axis of a rotating anode which is common to all of the electron sources. Each electron source emits electrons that strike the anode at respective strike points that are spatially separated from each other along the longitudinal direction, to produce respective emission centers, from which x-rays are emitted, each emission center being associated with respective ones of the x-ray sources.

X-ray source and X-ray system with such an X-ray source

Röntgenquelle (2) mit einer Mehrzahl von in einer Längsrichtung (3) voneinander beabstandeten Elektronenquellen (41...4n) und einer diesen gegenüberliegend angeordneten, sich ebenfalls in Längsrichtung (3) erstreckenden gemeinsamen Anode (8). Die von den Elektronenquellen (41...4n) ausgehenden Elektronen zur Erzeugung von separaten Emissionszentren (181...18n) treffen an in Längsrichtung (3) räumlich voneinander beabstandeten Stellen auf die Anode (8). Die Anode (8) ist um eine in Längsrichtung (3) orientierte Achse (A) drehbar. X-ray source (2) having a plurality of electron sources (41 ... 4n) spaced apart from each other in a longitudinal direction (3) and a common anode (8) arranged opposite the latter and likewise extending in the longitudinal direction (3). The electrons emanating from the electron sources (41... 4n) for producing separate emission centers (181... 18n) impinge on the anode (8) at locations spaced from one another in the longitudinal direction (3). The anode (8) is rotatable about an axis (A) oriented in the longitudinal direction (3).

Characteristic x-ray producing apparatus

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Electron guide and receiving element

FIELD: antenna equipment.SUBSTANCE: invention relates to an electronic antenna as an anode for micro- or nanofocus generation of X-rays. Device comprises antenna base (0345) and antenna element (0335) located on antenna base so that antenna element protrudes from front surface of antenna base. Antenna is configured to direct and attract electrons (0325) in its proximity to the antenna element top part.EFFECT: enabling the anode to determine the size of the focal spot when creating micro- or nanofocus ultraviolet (UV) light beams or visible-light beams for different wavelengths depending on the material and/or design of the electronic antenna.20 cl, 11 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 705 092 C1 (51) МПК H01J 35/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H01J 35/08 (2019.05) (21)(22) Заявка: 2018124318, 04.12.2015 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): ЛЮКСБРАЙТ АБ (SE) Дата регистрации: 05.11.2019 Приоритет(ы): (22) Дата подачи заявки: 04.12.2015 (45) Опубликовано: 05.11.2019 Бюл. № 31 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 04.07.2018 (86) Заявка PCT: EP 2015/078733 (04.12.2015) 2 7 0 5 0 9 2 (56) Список документов, цитированных в отчете о поиске: US 7050540 B2, 23.05.2006. US 20140072102 A1, 13.03.2014. RU 2524351 C2, 27.07.2014. R U 04.12.2015 (72) Автор(ы): ХУ, Цю-Хун (SE) 2 7 0 5 0 9 2 R U WO 2017/092834 (08.06.2017) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) НАПРАВЛЯЮЩИЙ И ПРИНИМАЮЩИЙ ЭЛЕКТРОНЫ ЭЛЕМЕНТ (57) Реферат: Изобретение относится к электронной антенне находящихся в ее близости, к верхней части в качестве анода для микро- или нанофокусной антенного элемента. Техническим результатом генерации рентгеновского излучения. Устройство является предоставление аноду возможности содержит антенное основание (0345) и антенный определять размер ...

X-ray tube

본 발명은 엑스선관에 관한 것으로서, 전자빔의 충돌에 의해 엑스선 초점위치로부터 엑스선을 발생하는 타겟면을 가진 양극과, 이 양극의 상기 타겟면에 대향하여 배치되고, 또 상기 엑스선 초점위치로부터 가장 먼 계곡부분, 이 계곡부분으로부터 상기 양극 방향에 비스듬하게 올라가는 적어도 하나의 경사벽면 및 상기 경사벽면에 형성된 거의 사각형 모양의 수속홈을 가진 수속전극과, 이 수속전극의 상기 수속홈 내에 배치된 전자빔 방출용 캐소드를 구비한 엑스선관에 잇어서, 상기 수속홈은 상기 캐소드의 단부와 대면하는 적어도 하나의 단벽으로부터 상기 캐소드의 길이방향을 따른 두 개의 측벽에 걸쳐 비틀린 제 1 및 제 2 구석부분을 갖고, 또 상기 계곡부분으로부터 먼 쪽에 위치하는 제 1 구석부분 쪽이 상기 계곡부분에 가까운 쪽에 위치하는 제 2 구석부분보다도 구부러지는 정도를 완만하게 하고 있으며, 이 구성에 의해 엑스선관의 엑스선 초점의 비틀림이 감소되는 것을 특징으로 한다. The present invention relates to an X-ray tube, comprising: an anode having a target surface for generating X-rays from an X-ray focal position by collision of an electron beam, and disposed opposite to the target surface of the anode, and farthest from the X-ray focal position. A converging electrode having a portion, at least one inclined wall surface obliquely rising from the valley portion in the direction of the anode, and a substantially rectangular converging groove formed in the inclined wall surface, and an electron beam emission cathode disposed in the converging groove of the converging electrode. In the X-ray tube provided with the converging groove, the converging groove has a first and a second corner portion twisted from at least one end wall facing the end of the cathode across two sidewalls along the longitudinal direction of the cathode, and the valley The first corner portion located far from the portion is located closer to the valley portion. The degree of bending is more gentle than that of the second corner, and the twist of the X-ray focal point of the X-ray tube is reduced by this configuration.

X-ray tube

Apparatus for X-ray tomography with an electronically deflected electron beam

Vorrichtung zur Röntgentomographie mit einem elektromagnetisch abgelenkten Elektronenstrahl, bestehend aus: – einer Elektronenkanone (1), – einem Fokussierspulensystem (3), welches den Elektronenstrahl (2) bündelt, – einem elektromagnetischen Ablenksystem für ein- oder zweidimensionale Strahlauslenkung (4), welches den Elektronenstrahl (2) quer zur Elektronenstrahlachse periodisch und mit hoher Geschwindigkeit aus seiner axialen Ruhelage auslenkt, – einem Strahlungserzeugungstarget (5), welches in der Verlängerung der Achse der Elektronenkanone (1) angeordnet ist, – einem bogenförmigen oder linearen Detektorarray (9) mit vorzugsweise lückenlos aneinandergereihten Detektorelementen (10), – einem zwischen Strahlungserzeugungstarget (5) und Detektorarray (9) verbleibenden Raum zur Anordnung eines Untersuchungsobjektes (8), wobei das Untersuchungsobjekt (8) so angeordnet ist, dass es sich ganz oder teilweise in dem durch den Brennfleck (6) und die Detektorelemente (10) des Detektorarrays (9) gebildeten Strahlungsfächer befindet, – einem Vakuumgefäß (12), in dem mindestens die Elektronenkanone (1) und das Strahlungserzeugungstarget (5) angeordnet sind, – einer nachgeordneten Elektronik... Device for X-ray tomography with an electromagnetically deflected electron beam, consisting of: An electron gun (1), A focusing coil system (3) which focuses the electron beam (2), An electromagnetic deflection system for one or two-dimensional beam deflection (4), which deflects the electron beam (2) transversely to the electron beam axis periodically and at high speed from its axial rest position, A radiation generation target (5) which is arranged in the extension of the axis of the electron gun (1), An arcuate or linear detector array (9) with detector elements (10), preferably lined up without any gaps, A space remaining between the radiation generation target (5) and the detector array (9) for arranging an examination subject (8), the examination subject (8) being arranged so as ...

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotating anode or rotating frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

一种利用旋转阳极或旋转帧管中的z偏转的快速剂量调制，其中将电子束从形成于阳极上的第一焦斑区域偏转到第二焦斑区域，其中仅第一焦斑区域中产生的电磁射束对有用的电磁曝光束有贡献，其中将第二焦斑区域设计成避免将电磁射束发射到有用的电磁射束方向的方向中。

Fast dose modulation using Z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Apparatus and method for controlling an electron beam for the generation of X-radiation and X-ray tube

Die Erfindung betrifft eine Vorrichtung zur Steuerung eines Elektronenstrahls (11) für die Erzeugung von Röntgenstrahlung, aufweisend einen an eine Emitterspannung (UE) legbaren Emitter (1) von Elektronen zur Erzeugung eines Elektronenstrahls (11), eine Blende (2), wenigstens zwei, der Blende (2) zugeordnete Steuermittel (3, 4) zur Beeinflussung des Elektronenstrahls (11) und Schaltmittel (6), mit denen an die wenigstens zwei Steuermittel (3, 4) wenigstens zwei verschiedene elektrische Spannungen (U1, U2) anlegbar sind, wobei an den wenigstens zwei Steuermitteln (3, 4) aber jeweils die gleiche elektrische Spannung (U1, U2) anliegt und wobei der Verbindungsleitung (10) des einen Steuermittels (4) mit den Schaltmitteln (6) zur Umschaltung der Spannung (U1, U2) eine beim Umschalten der Spannung (U1, U2) die Einstellung der jeweiligen Spannung (U1, U2) an dem einen Steuermittel (4) zeitlich verzögernde elektrische Schaltung (5) zugeordnet ist. Die Erfindung betrifft außerdem ein Betriebsverfahren für die Vorrichtung sowie eine mit der Vorrichtung versehene Röntgenröhre (13).

Correction configuration for X-ray generator, correction method, X-ray imaging system, computer program, and computer-readable medium

Focus detector arrangement for generating phase-contrast x-ray images and method for this

The invention relates to a focus detector arrangement of an X-ray apparatus (1) for generating projective or tomographic phase-contrast images of an examination object (7, P), wherein a bundle of coherent X-rays (Si) is generated by an anode (12) that has areas (13) of different radiation emission arranged in strips and extending parallel to the grid lines of the phase grid (G1) of the focus detector arrangement. In addition, the invention also relates to a method for generating projective or tomographic X-ray phase-contrast images of an examination object with the aid of such a focus detector arrangement, wherein a bundle of coherent radiation is generated by an anode (12) that has areas (13) of different radiation emission arranged in strips and extending parallel to the grid lines of the phase grid (G1).

Apparatus and method for controlling an electron beam for the generation of X-radiation and X-ray tube

Vorrichtung zur Steuerung eines Elektronenstrahls (11) für die Erzeugung von Röntgenstrahlung, aufweisend – einen an eine Emitterspannung (UE) legbaren Emitter (1) von Elektronen zur Erzeugung eines Elektronenstrahls (11), – eine Blende (2), – wenigstens zwei, der Blende (2) zugeordnete Steuermittel (3, 4) zur Beeinflussung des Elektronenstrahls (11) und – Schaltmittel (6), mit denen an die wenigstens zwei Steuermittel (3, 4) wenigstens zwei verschiedene elektrische Spannungen (U1, U2) anlegbar sind, wobei an den wenigstens zwei Steuermitteln (3, 4) aber jeweils die gleiche elektrische Spannung (U1, U2) anliegt, und wobei der Verbindungsleitung (10) des einen Steuermittels (4) mit den Schaltmitteln (6) zur Umschaltung der Spannung (U1, U2) eine beim Umschalten der Spannung (U1, U2) die Einstellung der jeweiligen Spannung (U1, U2) an dem einen Steuermittel (4) zeitlich verzögernde elektrische Schaltung (5) zugeordnet ist. Apparatus for controlling an electron beam (11) for the generation of X-radiation, comprising An emitter (1) of electrons which can be applied to an emitter voltage (UE) for producing an electron beam (11), A panel (2), - At least two, the diaphragm (2) associated control means (3, 4) for influencing the electron beam (11) and - Switching means (6), with which at least two different electrical voltages (U1, U2) can be applied to the at least two control means (3, 4), wherein at the at least two control means (3, 4) but in each case the same electrical voltage (U1 , U2), and wherein the connecting line (10) of the one control means (4) with the switching means (6) for switching the voltage (U1, U2) when switching the voltage (U1, U2), the setting of the respective voltage (U1 , U2) is assigned to the one control means (4) time-delaying electrical circuit (5).

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotating anode or rotating frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

一种利用旋转阳极或旋转帧管中的z偏转的快速剂量调制，其中将电子束从形成于阳极上的第一焦斑区域偏转到第二焦斑区域，其中仅第一焦斑区域中产生的电磁射束对有用的电磁曝光束有贡献，其中将第二焦斑区域设计成避免将电磁射束发射到有用的电磁射束方向的方向中。

X-ray generator

Wide scanning x-ray source

An imaging tube ( 12 ) includes a cathode ( 30 ) that emits an electron beam ( 32 ) and an anode ( 38 ). The anode ( 38 ) includes multiple target surfaces ( 36 ). Each of the target surfaces ( 36 ) has a focal spot that receives the electron beam ( 32 ). The target surfaces ( 36 ) generate multiple x-ray beams ( 42 ) in response to the electron beam ( 32 ). Each x-ray beam ( 42 ) is associated with one of the target surfaces ( 36 ). An x-ray imaging system ( 10 ) includes the cathode ( 30 ) and the anode ( 38 ). A controller ( 28 ) is electrically coupled to the cathode ( 30 ) and adjusts emission of the electron beam ( 32 ) on the anode ( 38 ).

Cathode head and X-ray tube with multiple filaments for high emission focus

Apparatus for generating x-ray

본 발명은 엑스-레이 발생장치에 관한 것으로, 진공챔버 내에 구비된 전자총으로부터 방출되는 전자 빔을 타겟과 충돌시켜 검사대상물에 엑스-레이(X-ray)를 발생시키는 엑스-레이 발생장치에 있어서, 상기 타겟의 하부측에 구비되며, 상기 전자 빔이 상기 타겟에 충돌되기 이전에 자기장에 의해 일측 방향으로 편향시키는 적어도 하나의 타겟 편향코일부와, 상기 타겟의 특정 영역 내에 미리 설정된 편향 패턴으로 상기 전자 빔의 충돌 위치가 변경될 수 있도록 상기 타겟 편향코일부의 동작을 제어하는 제어부를 포함함으로써, 비교적 간단한 구조를 가지면서도 타겟의 사용수명을 최대한 연장할 수 있을 뿐만 아니라 엑스-레이 발생장치의 유지비용을 최대한 감소시킬 수 있는 효과가 있다. The present invention relates to an x-ray generator, and more particularly, to an x-ray generator for generating X-rays on an object to be inspected by colliding an electron beam emitted from an electron gun provided in a vacuum chamber with a target, At least one target deflection coil portion provided at a lower side of the target and deflecting the electron beam in one direction by a magnetic field before the electron beam collides with the target; And the control unit controls the operation of the target deflection coil part so that the collision position of the beam can be changed. Thus, it is possible to maximize the service life of the target while having a relatively simple structure, Can be reduced as much as possible.

Device and method for obtaining distributed x-rays

FIELD: physics. SUBSTANCE: hot cathode of the electron gun is used in a vacuum to create electron beams having a certain initial energy of motion and velocity. Periodic scanning is carried out by electron beams with initially low energy, which thus are deflected accordingly. The flow limiting device is provided on the trajectory of the electron beam passage along the direction of the corresponding deflection. Through the openings arranged in the matrix on the flow limiting device, only a portion of the electron beams aimed at specific positions can pass to form successive electron beam flows distributed in the matrix. These electron beam flows are accelerated by a high-voltage electric field to produce high energy, the anode targets are bombarded and thus sequentially the corresponding focal spots and X-rays scattered as a matrix on the anode target are created. EFFECT: simplifying the device, increasing the reliability and effectiveness of the survey. 15 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 634 906 C2 (51) МПК H01J 35/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2015131158, 21.11.2013 (24) Дата начала отсчета срока действия патента: 21.11.2013 Дата регистрации: Приоритет(ы): (30) Конвенционный приоритет: 27.12.2012 CN 201210581566.9 (45) Опубликовано: 08.11.2017 Бюл. № 31 (56) Список документов, цитированных в отчете о поиске: US 2012057669A1, 08.03.2012. US (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.07.2015 2004208280, 21.10.2004 . US 2012294424А1, 22.11.2012. US 5596621А, 21.01.1997. US 4024424А, 17.05.1977. US 2010260317А1, 14.10.2010 . (86) Заявка PCT: CN 2013/087608 (21.11.2013) (87) Публикация заявки PCT: 2 6 3 4 9 0 6 (43) Дата публикации заявки: 30.01.2017 Бюл. № 4 (73) Патентообладатель(и): ТСИНХУА ЮНИВЕРСИТИ (CN), НЬЮКТЕК КОМПАНИ ЛИМИТЕД (CN) R U 08.11.2017 (72) Автор(ы): ЛИ Юаньцзин (CN), ЛЮ Яохун (CN), ЛЮ Цзиньшэн (CN), ТАН Хуапин (CN), ТАН ...

X-ray tube

에미터에서 방출된 전자빔을 더욱 집속시킴으로써 보다 선명한 엑스선 이미지를 얻을 수 있는 엑스선 튜브를 제공한다. 본 발명의 일 실시예에 따른 엑스선 튜브는, 캐소드 전극에 형성되어 전자빔을 방출하는 에미터, 상기 캐소드 전극 상에 형성되며, 상기 전자빔을 통과시키기 위한 다수의 게이트홀을 포함하는 게이트 메쉬, 상기 게이트 메쉬 상에 형성되며, 상기 다수의 게이트홀과 같은 동심원을 가지는 다수의 집속 게이트홀을 포함하는 집속 게이트 메쉬, 상기 집속 게이트 메쉬 상에 형성되며, 상기 게이트 메쉬 및 집속 게이트 메쉬를 통과한 전자빔을 집속시키는 집속 전극 및 상기 집속된 전자빔의 충돌에 의해 엑스선을 발생시키는 아노드 전극을 포함한다. Ray tube to provide a clearer x-ray image by further focusing the electron beam emitted from the emitter. An X-ray tube according to an embodiment of the present invention includes: an emitter formed on a cathode electrode to emit an electron beam; a gate mesh formed on the cathode electrode and including a plurality of gate holes for passing the electron beam; A converging gate mesh formed on the mesh and including a plurality of concentrating gate holes having concentric circles such as the plurality of gate holes, an electron beam passing through the gate mesh and the focusing gate mesh, And an anode electrode for generating X-rays by collision of the focused electron beam.

X=ray tube for computer tomography

The tube includes a magnet system with spring-focus for deflecting and focusing an electron beam. The magnet system includes a carrier (5) forming a yoke (6) with four angularly offset pole projections (7,8,9,10), arranged in opposing pairs. Coils (11,12,13,14) on the carrier are arranged in two pairs between pole projections. The coils of each pair carry a common current such that the electron beam (4) can be deflected by a coil pair in a direction which is different from that of the other coil pair.

X-ray tube device

Conventionally, the magnetic field generator 4 was arranged perpendicularly to the axis O of the electron beam B. The magnetic field generator 4 of this invention is arranged so as to be inclined relative to the axis V perpendicular to the axis O of the electron beam B. Specifically, the magnetic field generator 4 is arranged so as to be inclined relative to the axis V perpendicular to the axis O of the electron beam B within the range in the cathode 2 side from the focused and deflected electron beam B. Inclination up to the anode 5 side opposite to the cathode 2 side will lead to a possibility of increasing the reduced X-ray source diameter. Thus, arranging the magnetic field generator 4 so as to be inclined within the range in the cathode side from the electron beam B may reduce the X-ray source diameter.

X-ray tube and method for operating an X-ray tube

Eine Röntgenröhre weist ein evakuiertes, drehbares Gehäuse (2), in welchem eine zur Emission eines Elektronenstrahls ausgebildete Kathode (5) und eine mit dieser zusammenwirkende Anode (4) angeordnet sind, sowie zwei zur Beeinflussung des Elektronenstrahls vorgesehene, außerhalb des Gehäuses (2) angeordnete, voneinander beabstandete Quadrupol-Magnetsysteme (8, 9) auf. An X-ray tube has an evacuated, rotatable housing (2) in which a cathode (5) designed to emit an electron beam and an anode (4) that interacts with it are arranged, as well as two outside the housing (2) provided for influencing the electron beam. arranged, spaced apart quadrupole magnet systems (8, 9).

X-ray tube whose electron beam is manipulated synchronously with the rotational anode movement

It is described an X-ray tube (100) comprising a rotating anode (130), which is provided with a pull electrode (140). The pull electrode (140) interacts with a fixed electron source (110) in order to generate a modulated electron beam (120a, 120b). The beam modulation may be an intensity variation and/or a spatial deflection. The pull electrode (140) is mounted in a fixed position with respect to the anode (130) and rotates together therewith. The pull electrode (140) may have a hole (141) for passing the electron beam (120a). When being in front of the electron source (110), the pull electrode (140) causes a high electric field (142a) such that a strong electron beam (120a) is generated. When being not in front of the electron source (110) only a low current or a zero current electron beam (120b) is generated. However, the pull electrode (740) may also cause a radial beam deflection such that depending on the angular position of the anode (730) the position of a focal spot (721a, 721b) of the electron beam (720) is varied.

X-ray tube

Die Erfindung betrifft eine Röntgenröhre mit einem Vakuumgehäuse (1), umfassend einen Kathodenraum (2) mit einer Kathodenanordnung (5), einen Anodenraum (3) mit einer Anodenanordnung (13, 14) und eine Driftstrecke (4), die zwischen dem Kathodenraum (2) und dem Anodenraum (3) angeordnet ist, wobei die Driftstrecke (4) von einer Magnetanordnung (9) umschlossen ist. Erfindungsgemäß ist die Magnetanordnung (9) eine selbsttragende Konstruktion. Eine derartige Röntgenröhre weist einen konstruktiv einfachen Aufbau auf und erfordert einen geringeren Montageaufwand. The invention relates to an x-ray tube with a vacuum housing (1) comprising a cathode compartment (2) with a cathode arrangement (5), an anode compartment (3) with an anode arrangement (13, 14) and a drift path (4) arranged between the cathode compartment ( 2) and the anode chamber (3) is arranged, wherein the drift path (4) by a magnet arrangement (9) is enclosed. According to the invention, the magnet arrangement (9) is a self-supporting construction. Such an X-ray tube has a structurally simple construction and requires less installation effort.

Rotating X-ray tube with external bearings

X-ray tube includes a rotatable envelope in which is mounted an electron gun at one end and a target anode at the other end. A fixed means for deflecting the electron beam from the electron gun is provided to deflect the electron beam on a fixed path as the envelope of the x-ray tube rotates about an axis. The electron beam being confined to a fixed path results in the electron beam striking various positions of the target anode to provide for improved heat dissipation. The electron beam is deflected along the fixed path using magnetic deflection means including magnetic deflection coils positioned external of the envelope to provide a deflection field transverse to the electron beam. The target anode is cooled by directing a cooling fluid on an external side of the target anode.

X-ray tube with spring focus for enlarged resolution

X-ray tube device

X-ray tube apparatus

Conventionally, the magnetic field generator was arranged perpendicularly to the axis of the electron beam. The magnetic field generator of this invention is arranged so as to be inclined relative to the plane perpendicular to the axis of the electron beam. Specifically, the magnetic field generator is arranged so as to be inclined relative to the plane perpendicular to the axis of the electron beam within the range in the cathode side from the focused and deflected electron beam. Inclination up to the anode side opposite to the cathode side will lead to a possibility of increasing the reduced X-ray source diameter. Thus, arranging the magnetic field generator so as to be inclined within the range in the cathode side from the electron beam may reduce the X-ray source diameter.

X-ray tube apparatus

Conventionally, the magnetic field generator was arranged perpendicularly to the axis of the electron beam. The magnetic field generator (4) of this invention is arranged so as to produce an asymmetric magnetic field.

X-ray tube with variable focus

X-ray machine with an x-ray tube with variofocus

Patent DE3330806C2

LENS GRID SYSTEM FOR ELECTRON TUBES

Compensation of anode wobble for x-ray tubes of the rotary-anode type

The present invention refers to X-ray tubes of the rotary-anode type for generating a fan beam of X-rays. More particularly, the invention is concerned with a system and method for compensating a class of system-related disturbances of the focal spot position FS on a target area AT of the rotating anode RA and particularly for compensating the anode wobble in an X-ray tube XT of the aforementioned type, which occurs as a periodically wobbling inclination angle of the anode disk's rotational plane with respect to an ideal rotational plane (z = 0) which is oriented normal to the rotational axis z of the rotary shaft S on which the anode disk RA is inclinedly mounted due to an inaccuracy during its production process. For this purpose, the electron beam generated by a thermoionic or other type of electron emitter of the tube's cathode C and thus the focal spot position FS on a target area AT of the anode disk's X-ray generating surface (anode target) are steered such that the focal spot FS stays within the plane P CXB of the central X-ray fan beam CXB.

Method and apparatus for prolonging the life of an X-ray target

X-ray source assembly having enhanced output stability, and fluid stream analysis applications thereof

An x-ray source assembly and method of operation are provided having enhanced output stability. The assembly includes an anode having a source spot upon which electrons impinge and a control system for controlling position of the anode source spot relative to an output structure. The control system can maintain the anode source spot location relative to the output structure notwithstanding a change in one or more operating conditions of the x-ray source assembly. One aspect of the disclosed invention is most amenable to the analysis of sulfur in petroleum-based fuels.

Cathode head with focal spot control

A cathode head is provide that is suitable for use in an x-ray device that includes an anode having a target surface configured and arranged to receive electrons emitted by the cathode head. The cathode head may be constructed of magnetic or non-magnetic material and includes an emitter block carrying a filament that defines a longitudinal axis about which is disposed one or more magnetic coils. The filament is configured and arranged to emit an electron beam that defines a focal spot on the target surface of the anode. The magnetic coil, or coils, disposed about the longitudinal axis defined by the filament generate a magnetic field that enables control of the location of the focal spot on the target surface of the anode.

X-ray system with efficient anode heat dissipation

提供用于高分辨率成像应用具有提高的额定功率的X射线系统。X射线源包括至少一个集成致动器单元(206，206′，206a或206b)，用于通过相对于固定参考位置移动X射线源阳极(204，204′，204a′或204b′)的位置进行至少一个平移和/或旋转位移。这有助于克服由于焦点位置(205)阳极过热造成的功率限制。此外，可提供聚焦单元(203)和/或偏转装置(211，211a或211b)，所述聚焦单元用于使阳极的焦点(205)聚焦调整以补偿所述阳极位移导致的焦点大小的偏差，所述偏转装置用于产生电场和/或磁场使电子束(202，202a或202b)沿着与旋转阳极的位移运动方向相反的方向偏转。

Apparatus and method for magnetic control of an electron beam

An apparatus and method for an electron beam manipulation coil for an x-ray generation system includes the use of a control circuit. The control circuit includes a first low voltage source, a second low voltage source, and a first switching device coupled in series with the first low voltage source and configured to create a first current path with the first low voltage source when in a closed position. The control circuit also includes a second switching device coupled in series with the second low voltage source and configured to create a second current path with the second low voltage source when in a closed position and a capacitor coupled in parallel with an electron beam manipulation coil and positioned along the first and second current paths.

Apparatus and method for magnetic control of an electron beam

An apparatus and method for magnetic control of an electron beam includes a control circuit having a first low voltage source and a second low voltage source. The control circuit also includes a first switching device coupled in series with the first low voltage source and configured to create a first current path with the first low voltage source when in a closed position and a second switching device coupled in series with the second low voltage source and configured to create a second current path with the second low voltage source when in a closed position. The control circuit further includes a capacitor coupled in parallel with an electron beam manipulation coil and positioned along the first and second current paths and a current source circuit electrically coupled to the electron beam manipulation coil and constructed to generate an offset current in the first and second current paths.

Alignment and focusing of electron beam at X-ray source

X-ray tube cathode with magnetic electron beam steering

An x-ray tube cathode with magnetic electron beam steering. In one example embodiment, an x-ray tube cathode includes a cathode head and an electron emitter. The cathode head includes electrically conductive and non-magnetic material integrated with magnetic material. The cathode head defines an emitter slot in a portion of electrically conductive and non-magnetic material positioned between two portions of magnetic material. The electron emitter is positioned within the emitter slot. The electron emitter is configured to emit a beam of electrons. The beam of electrons is configured to be both focused by the electrically conductive and non-magnetic material and steered during beam formation by the magnetic material.

Coupled magnet currents for magnetic focusing

Issues related to maintaining the size of a focal spot on the target material of an X-ray source are addressed by linking the currents used in a magnetic focusing system employed in the X-ray source. The size of the focal spot on the target is less sensitive to current changes applied to the magnetic focusing system due to this linkage.

Emitter, electron emission method using the emitter, and X-ray tube