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Применить Всего найдено 3. Отображено 3.
23-04-2020 дата публикации

Method For Obtaining A Material With Giant Magnetocaloric Effect By Ion Irradiation

Номер: US20200126697A1
Автор: Cervera Sophie, Garcia Vincent, Marangolo Massimiliano, Trassinelli Martino, Vernhet Dominique
Принадлежит:

The present invention concerns, in particular, a method for obtaining a product with magnetocaloric effect from a single piece of material having a magnetic phase transition, the method comprising irradiation of at least one part of the material with ions, the irradiation being carried out with a suitable flux so that, after the irradiation, the material has various magnetic phase transition temperatures in the various parts of the material. 1. Method for obtaining a magnetocaloric product from a single piece of material having a magnetic phase transition , the method comprising irradiating at least part of the material with ions , wherein said irradiating is conducted with a fluence adapted so that the material has , after said irradiating , different magnetic phase transition temperatures in different parts of the material.2. Method according to claim 1 , wherein the single piece of material has a first-order magnetic phase transition.3. Method according to claim 1 , wherein the fluence is adapted so that the magnetic phase transition temperature of the material varies by at least 0.5 kelvin between two different parts of the material.4. Method according to claim 1 , wherein the fluence is adapted so that the material has claim 1 , after said irradiating claim 1 , a maximum difference in the magnetic phase transition temperatures of the different parts of the product of value within the range of 0.5 to 150 kelvins.5. Method according to claim 1 , wherein the fluence is adapted so that the magnetic phase transition temperature of the material varies claim 1 , after said irradiating claim 1 , monotonously from a first part of the material to a second part of the material.6. Method according to claim 1 , wherein the fluence is adapted so that the magnetic phase transition temperature of the material varies claim 1 , after said irradiating claim 1 , continuously from a first part of the material to a second part of the material.7. Method according to claim 1 , wherein ...

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Номер записи: 1
19-07-2019 дата публикации

PHOTON X DETECTOR IN THE ENERGY RANGE 1 TO 5 KEV

Номер: FR3076948A1
Автор: Christophe Prigent, Dominique Vernhet, Emily Lamour, Francis Penent, Loic Journel, Lyas Ismail, Marc Simon, Regis Vacheresse
Принадлежит: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS, SORBONNE UNIVERSITÉ

La présente invention concerne un détecteur de photons sensible en temps et en position comprenant une photocathode (10) et au moins une galette de microcanaux (20) placée en aval de la photocathode (10), caractérisé en ce que la photocathode (10) comprend une structure multicouche comprenant un substrat support (12) et deux couches actives (14, 16) conçues pour convertir les photons incidents reçus en électrons et recevoir une tension de polarisation par rapport à la galette de microcanaux (20) permettant d'accélérer et confiner les électrons et que le détecteur comprend un capteur (30) en aval de la galette de microcanaux (20) et adapté pour délivrer un signal identifiant l'instant de réception d'un électron provenant de la galette de microcanaux (20) et le lieu de réception de l'électron sur la surface du capteur (30). The present invention relates to a time-sensitive and position-sensitive photon detector comprising a photocathode (10) and at least one microchannel wafer (20) placed downstream of the photocathode (10), characterized in that the photocathode (10) comprises a multilayer structure comprising a support substrate (12) and two active layers (14, 16) adapted to convert the incident photons received into electrons and receive a bias voltage with respect to the microchannel wafer (20) for accelerating and confining the electrons and that the detector comprises a sensor (30) downstream of the microchannel wafer (20) and adapted to deliver a signal identifying the instant of reception of an electron from the microchannel wafer (20) and the location receiving the electron on the surface of the sensor (30).

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Номер записи: 2
18-10-2018 дата публикации

Procédé d'obtention d'un matériau à effet magnétocalorique géant par irradiation d'ions

Номер: WO2018189260A1
Автор: Dominique Vernhet, Martino TRASSINELLI, Massimiliano Marangolo, Sophie CERVERA, Vincent Garcia
Принадлежит: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), SORBONNE UNIVERSITÉ

La présente invention concerne notamment un procédé d'obtention d'un produit à effet magnétocalorique à partir d'un matériau d'un seul tenant présentant une transition de phase magnétique, le procédé comprenant une irradiation d'au moins une partie du matériau avec des ions, l'irradiation étant conduite avec une fluence adaptée pour que le matériau présente, après l'irradiation, des températures de transition de phase magnétique différentes dans des parties différentes du matériau.

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Номер записи: 3