公开(公告)号：US20220359146A1

公开(公告)日：2022-11-10

申请号：US17763186

申请日：2020-09-04

Applicant: Photo electron Soul Inc.

Inventor： Hokuto IIJIMA

IPC: H01J3/02 ,  H01J1/34 ,  H01J1/52

Abstract: An object is to provide an electron gun that makes it possible to verify whether or not an electron beam emitted form a photocathode is misaligned from a designed emission center axis. The object can be achieved by an electron gun including: a light source; a photocathode; and an anode. The electron gun includes an intermediate electrode arranged between the photocathode and the anode, an electron beam shielding member configured to block a part of an electron beam, a measurement unit configured to measure an intensity of an electron beam blocked by the electron beam shielding member, and an electron beam emission direction deflector arranged between the anode and the electron beam shielding member and configured to change a position where an electron beam that passed through the anode reaches the electron beam shielding member. The intermediate electrode has an electron beam passage hole and a drift space.

公开(公告)号：US11430625B2

公开(公告)日：2022-08-30

申请号：US16966910

申请日：2018-12-27

Applicant: 38th Research Institute, China Electronics Technology Group Corporation

Inventor： Huarong Liu ,  Xueming Jin ,  Yuxuan Qi ,  Xuehui Wang ,  Yijing Li ,  Junting Wang ,  Chunning Zheng ,  Qing Qian ,  Tingting Luo ,  Zhonglin Dong

IPC: H01J1/304 ,  H01J3/02 ,  H01J37/073

Abstract: The present disclosure provides an electron source operating method, the electron source including at least one emission site fixed on a tip, the emission site being a reaction product formed by metal atoms of a surface of the tip and gas molecules under an electric field, and the operating method comprises emitting electrons by controlling operating parameters of the electron source.

公开(公告)号：US11315747B2

公开(公告)日：2022-04-26

申请号：US17292862

申请日：2019-11-07

Applicant: PEKING UNIVERSITY

Inventor： Xianlong Wei ,  Wei Yang

IPC: H01J9/18 ,  H01J3/02

Abstract: Provided are an on-chip miniature electron source and a method for manufacturing the same. The on-chip miniature electron source includes: a thermal conductive layer; an insulating layer provided on the thermal conductive layer, where the insulating layer is made of a resistive-switching material, and at least one through hole is provided in the insulating layer; and at least one electrode pair provided on the insulating layer, where at least one electrode of the electrode pair is in contact with and connected to the thermal conductive layer via the through hole, where there is a gap between two electrodes of the electrode pair, and a tunnel junction is formed within a region of the insulating layer under the gap. Thus, heat generated by the on-chip micro electron source can be dissipated through the electrode and the thermal conductive layer, thereby significantly improving heat dissipation ability of the on-chip miniature electron source.

公开(公告)号：US11195685B2

公开(公告)日：2021-12-07

申请号：US17044856

申请日：2019-08-07

Applicant: Photo electron Soul Inc.

Inventor： Hokuto Iijima

IPC: H01J3/14 ,  H01J31/04 ,  H01J1/34 ,  H01J1/46 ,  H01J3/02

Abstract: The present invention addresses the problem of providing a device with which it is possible to adjust the focal point of an electron beam both toward a shorter focal point and toward a longer focal point after an electronic gun was fitted on a counterpart device.
The aforementioned problem can be solved by an electron gun including a photocathode, and an anode, the electron gun furthermore comprising an intermediate electrode disposed between the photocathode and the anode, the intermediate electrode comprising an electron-beam passage hole through which an electron beam released from the photocathode passes, and the electron-beam passage hole having formed therein a drift space in which, when an electrical field is formed between the photocathode and the anode due to application of a voltage, the effect of the electrical field can be disregarded.

公开(公告)号：US20210370098A1

公开(公告)日：2021-12-02

申请号：US17309048

申请日：2019-10-14

Applicant: Elekta Limited

Inventor： Chris Flint ,  Keith Richardson ,  Marcelo Jordao ,  Alessandra Chiap ,  Mark Holmes

IPC: A61N5/10 ,  G16H40/40 ,  H01J3/02 ,  G01R19/165

Abstract: Described is a method of determining whether repair or replacement of an electron gun of a radiotherapy device should be scheduled. The radiotherapy device comprises a linear accelerator and is configured to provide therapeutic radiation to a patient. The radiotherapy device comprises a vacuum tube comprising the electron gun, a waveguide configured to accelerate electrons emitted by the electron gun toward a target to produce said radiation. The radiotherapy device comprises also comprises a current sensor, the current sensor being configured to provide signals indicative of current supplied to the electron gun. The method comprises receiving a current value, processing the current value, and based on the processing of the current value, determining whether repair or replacement of the electron gun should be scheduled. Processing the current value comprises determining whether the current value meets at least one threshold criterion, and determining whether the current value has changed by at least a threshold amount in a particular time period.

公开(公告)号：US10950407B2

公开(公告)日：2021-03-16

申请号：US16897828

申请日：2020-06-10

Applicant: New Japan Radio Co., Ltd.

Inventor： Toru Kimura ,  Misao Iseki ,  Hideyuki Obata

IPC: H01J13/02 ,  H01J3/02 ,  H01J3/10

Abstract: An electron gun comprising a cathode having an electron emitting surface and whose planar shape is circular; a heater; an anode being arranged to oppose the cathode; and a heat resistant member. The anode applies a positive potential relative to the cathode to extract electrons in a predetermined direction. The cathode has, in a central portion thereof, a through hole along a central axis of the cathode. The heat resistant member has a first portion to close the through hole and a second portion being positioned between the cathode and the heater.

公开(公告)号：US20210050172A1

公开(公告)日：2021-02-18

申请号：US16966910

申请日：2018-12-27

Applicant: 38th Research Institute, China Electronics Technology Corporation

Inventor： Huarong LIU ,  Xueming JIN ,  Yuxuan QI ,  Xuehui WANG ,  Yijing LI ,  Junting WANG ,  Chunning ZHENG ,  Qing QIAN ,  Tingting LUO ,  Zhonglin DONG

IPC: H01J1/304 ,  H01J37/073 ,  H01J3/02

Abstract: The present disclosure provides an electron source operating method, the electron source including at least one emission site fixed on a tip, the emission site being a reaction product formed by metal atoms of a surface of the tip and gas molecules under an electric field, and the operating method comprises emitting electrons by controlling operating parameters of the electron source.

公开(公告)号：US20210035766A1

公开(公告)日：2021-02-04

申请号：US16500789

申请日：2018-03-30

Applicant: PHOTO ELECTRON SOUL INC.

Inventor： Tomohiro Nishitani ,  Atsushi Koizumi ,  Tomoaki Kawamata ,  Haruka Shikano

IPC: H01J1/94 ,  H01J3/02

Abstract: The present invention addresses the problem of providing an electron beam generator and an electron beam applicator for which maintenance is facilitated. The electron beam generator comprises a vacuum chamber, a photocathode holder, an activation vessel, and an internal motive power transmission member. The photocathode holder is capable of moving relative to the activation vessel.

公开(公告)号：US10692692B2

公开(公告)日：2020-06-23

申请号：US15164273

申请日：2016-05-25

Applicant: KLA-Tencor Corporation

Inventor： William G. Schultz ,  Gildardo Delgado ,  Garry A. Rose

IPC: H01J37/28 ,  H01J3/02 ,  H01J37/065 ,  H01J7/18 ,  H01J3/40

Abstract: An electron extractor of an electron source capable of absorbing contaminant materials from a cavity proximate to the extractor is disclosed. The electron extractor includes a body. The body of the electron extractor is formed from one or more non-evaporable getter materials. The one or more non-evaporable getter materials absorb one or more contaminants contained within a region proximate to the body of the electron extractor. The body of the electron extractor is further configured to extract electrons from one or more emitters posited proximate to the body of the electron extractor.

公开(公告)号：US10607804B2

公开(公告)日：2020-03-31

申请号：US16330982

申请日：2016-09-07

Applicant: Forschungszentrum Jülich GmbH

Inventor： Amir Tavabi ,  Penghan Lu ,  Martial Duchamp ,  Rafal Edward Dunin-Borkowski ,  Giulio Pozzi

IPC: H01J37/06 ,  H01J37/20 ,  H01J37/244 ,  H01J37/26 ,  H01J37/08 ,  H01J3/02

Abstract: The present invention refers to a device for generating charged particle beams with tunable orbital angular momentum. The device firstly includes one or more components for providing a charged particle beam. It is further characterized by an electrical arrangement for imparting a tunable orbital angular momentum to the charged particle beam during operation. The orbital angular momentum of the produced charged particle vortex beam is tunable by adjusting the amount of electrical current. The chirality of the produced charged particle vortex beam is switchable by reversing the direction of the electrical current. The generation of the charged particle vortex beam from the present invention does not depend on the energy of the charged particle beams. The generation of the charged particle vortex beams from the present invention is predictable and reproducible.