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公开(公告)号：US20240290567A1
公开(公告)日：2024-08-29
申请号：US18585720
申请日：2024-02-23
CPC分类号： H01J35/065 , H01J35/147
摘要： A field effect electron emitter comprises a segmented emission surface and a control unit. The segmented emission surface has a plurality of field effect emitter needles and a number of segments, each segment having an activatable part emission surface, wherein the plurality of field effect emitter needles are distributed on the activatable part emission surfaces. The control unit is configured to activate various groups with at least one of the number of segments for a simultaneous electron emission from respective activatable part emission surfaces such that coherent and grouped part emission surfaces able to be activated in succession overlap in pairs by at least 25%.
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公开(公告)号：US20240234075A1
公开(公告)日：2024-07-11
申请号：US18554872
申请日：2022-04-12
申请人： NCX Corporation
发明人： Jian ZHANG
CPC分类号： H01J35/065 , H01J9/18 , H01J35/045 , H01J35/147
摘要： A field emission cathode device includes a cathode element having a field emission surface and an adjacent gate electrode clement defining a first gap therebetween. A gate voltage applied to the gate electrode clement causes the field emission surface to emit electrons that are accelerated through the gate electrode element. The gate electrode element is disposed between the cathode element and an anode element. the anode element having an anode voltage applied thereto to attract the electrons emitted through the gate electrode element. A tuning electrode element is disposed between the gate electrode element and the anode element. The tuning electrode element has a tuning voltage applied thereto to decelerate the electrons directed through the gate electrode element and to direct the electrons therethrough toward the anode element. An associated method of forming a field emission cathode device is also provided.
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公开(公告)号：US20240055215A1
公开(公告)日：2024-02-15
申请号：US18232418
申请日：2023-08-10
申请人： X-SIGHT INCORPORATED
发明人： Winston Chern
CPC分类号： H01J35/153 , H01J35/065 , H01J35/16 , H01J35/147
摘要： An X-ray source design for improved reliability by mitigating the impact of vacuum arcs, ion back bombardment and ion sputtering includes an X-ray source including one or more field emitter arrays and a circuit configured to control the one or more field emitter arrays. The one or more field emitter arrays include a gate and an emitter. The circuit is configured to apply a voltage between the gate and the emitter.
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公开(公告)号：US11817287B1
公开(公告)日：2023-11-14
申请号：US18316257
申请日：2023-05-12
发明人： Li Xi , Kaiyuan Xue , Daining Fang
CPC分类号： H01J35/101 , H01J35/066 , H01J35/106 , H01J35/147 , H01J35/20 , H01J2235/1026 , H01J2235/1275
摘要： A rotary-transmission-target microfocus X-ray source and an X-ray generation method based on the rotary-transmission-target microfocus X-ray source are provided. The X-ray source comprises a chamber, and an electron beam system is installed in the chamber. The electron beam system is arranged on a same side as an anode target rotating shaft. A motor in a rotary anode target system drives an anode target to rotate through a bevel gear transmission device. The microstructure of a target is designed. An electron beam emitted by the electron beam system vertically bombards the metal target of the rotating anode target. A cooling system is configured to cool the anode target.
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公开(公告)号：US11974383B2
公开(公告)日：2024-04-30
申请号：US17649367
申请日：2022-01-30
发明人： Guoping Zhu , Jinglin Wu , Tieshan Zhang , Siming Chen , Xu Chu
CPC分类号： H05G1/52 , H01J35/147 , H05G1/58
摘要： 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.
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公开(公告)号：US11918830B2
公开(公告)日：2024-03-05
申请号：US17382044
申请日：2021-07-21
申请人： Susan L. Michaud , Daniel J. Raymond , Artur Teymurazyan , Ran Tu
发明人： Susan L. Michaud , Daniel J. Raymond , Artur Teymurazyan , Ran Tu
CPC分类号： A61N5/1077 , A61B6/03 , A61N5/1044 , A61N5/1067 , A61N5/1082 , G21K1/087 , G21K1/093 , G21K5/04 , A61N5/107 , A61N2005/1074 , A61N2005/1087 , A61N2005/1097 , H01J35/147
摘要： The invention comprises a method and apparatus for tuning a charged particle beam path of a charged particle beam system used to treat a tumor of a patient, comprising the steps of: positioning a two-dimensional charged particle detector in a beam line downstream from a magnet pair; operating windings of the magnet pair at a first power level to generate a first magnetic field; measuring a beam position with the first two-dimensional charged particle detector; adjusting a correction magnetic field by driving voltage of a correction coil at a second power level, the second power level less than five percent of the first power level, where the first magnetic field and the correction magnetic field combine to yield an operational magnetic field; and the steps of measuring and adjusting the correction magnetic field changing the operational magnetic field to adjust a measured beam position toward a target beam position.
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公开(公告)号：US20230369005A1
公开(公告)日：2023-11-16
申请号：US18316257
申请日：2023-05-12
发明人： Li XI , Kaiyuan XUE , Daining FANG
CPC分类号： H01J35/106 , H01J35/101 , H01J35/066 , H01J35/147 , H01J35/20 , H01J2235/1026 , H01J2235/1275
摘要： A rotary-transmission-target microfocus X-ray source and an X-ray generation method based on the rotary-transmission-target microfocus X-ray source are provided. The X-ray source comprises a chamber, and an electron beam system is installed in the chamber. The electron beam system is arranged on a same side as an anode target rotating shaft. A motor in a rotary anode target system drives an anode target to rotate through a bevel gear transmission device. The microstructure of a target is designed. An electron beam emitted by the electron beam system vertically bombards the metal target of the rotating anode target. A cooling system is configured to cool the anode target.
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公开(公告)号：US20190237287A1
公开(公告)日：2019-08-01
申请号：US16335102
申请日：2017-03-06
申请人： Shimadzu Corporation
发明人： Toshimichi MASAKI
CPC分类号： H01J35/147 , H01J35/14 , H01J35/16 , H01J35/18
摘要： 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 12 for generating an electron beam B, an anode 13 for accelerating the electron beam B and having a hole 13a allowing the electron beam B to pass through, a cylindrical holder shaft 14 forming a passage for allowing the electron beam B to pass through a hole 13a of the anode 13, a magnetic lens 17 arranged around the holder shaft 14 and configured to converge the electron beam B, a target holder 15 connected to the holder shaft 14, a target 16 arranged in the target holder 15 so that the electron beam B collides with the target 16, and an irradiation window 15b arranged in the target holder 15 and configured to extract X-rays generated from the target 15 to the outside. The inner wall of the holder shaft 14 is made of a carbon material to reduce X-rays generated when the electron beam B hits the holder shaft 14.
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公开(公告)号：US20190080876A1
公开(公告)日：2019-03-14
申请号：US16123374
申请日：2018-09-06
发明人： Jin-Woo JEONG , Yoon-Ho SONG
CPC分类号： H01J35/14 , H01J35/065 , H01J35/08 , H01J35/147 , H05G1/02 , H05G1/265 , H05G1/32 , H05G1/52
摘要： Provided is an X-ray imaging device and a driving method thereof, the X-ray imaging device including an electron beam generation unit including a plurality of nano-emitters and a cathode, a first focusing electrode configured to focus an electron beam emitted from the electron beam generation unit, a deflector configured to deflect the electron beam focused by the first focusing electrode, a limited electrode configured to limit traveling of the electron beam deflected by the deflector, and an anode configured to be irradiated with the electron beam to emit an X-ray, wherein the limited electrode includes a limited aperture which the electron beam pass.
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10.发明授权公开(公告)号：US11950944B2
公开(公告)日：2024-04-09
申请号：US17335491
申请日：2021-06-01
CPC分类号： A61B6/4405 , A61B6/4417 , A61B6/4441 , H01J35/147 , A61B6/022 , A61B6/025 , H01J35/18
摘要： 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.
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