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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
Applicant: Siemens Healthineers AG
Inventor： Joerg FREUDENBERGER , Michael WIMMER , Anja FRITZLER , Christoph JUD , Peter GEITHNER
CPC classification number: H01J35/065 , H01J35/147
Abstract: 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：US12058800B2
公开(公告)日：2024-08-06
申请号：US17863538
申请日：2022-07-13
Applicant: NANORAY CO., LTD.
Inventor： Jae Yun Park , Dong Hwan Kim , Young Hyun Choi
CPC classification number: H05G1/70 , H05G1/32 , H05G1/56 , H01J35/065
Abstract: A CNT X-ray tube control system according to an embodiment of the present disclosure includes a CNT X-ray tube including an anode electrode, a gate electrode, and a cathode electrode, and configured to generate X-rays from electric field emission; a dummy load including an anode electrode, a gate electrode, and a cathode electrode, and configured not to generate X-rays, the dummy load being connected to the CNT X-ray tube in parallel; a high-voltage part configured to control a voltage applied to the CNT X-ray tube; and a controller configured to control the CNT X-ray tube, the dummy load, and the high-voltage part. Particularly, a portable X-ray generation apparatus reduced in size can be provided, the apparatus including the dummy load having the same structure as a CNT to minimize the voltage variation of the high-voltage part during the ON/OFF operation of the CNT.
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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
Applicant: NCX Corporation
Inventor： Jian ZHANG
CPC classification number: H01J35/065 , H01J9/18 , H01J35/045 , H01J35/147
Abstract: 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：US20240188206A1
公开(公告)日：2024-06-06
申请号：US18438383
申请日：2024-02-09
Applicant: Research Instruments Corporation , Brown University
Inventor： Daniel John DeCiccio , Christoph Rose-Petruck
CPC classification number: H05G2/008 , H01J35/065 , H05G2/005 , H01J2235/082
Abstract: A modular laser-produced plasma X-ray system includes a liquid metal flow system enclosed within a low-pressure chamber, the flow system including a liquid metal, wherein in at least one location on the liquid metal forms a metal target directly illuminated by laser pulses, a circulation pump within the liquid metal flow system for circulating the liquid metal, a laser pulse emitter configured to transmit laser pulses into the chamber via a laser window, focusing optics, located between the emitter and the metal target, the focusing optics directing the laser pulses to strike the metal target at a target location to form X-ray pulses, and an X-ray window positioned within the chamber to enable the X-ray pulses to exit the chamber.
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公开(公告)号：US11990308B2
公开(公告)日：2024-05-21
申请号：US18008016
申请日：2021-05-26
Applicant: MEIDENSHA CORPORATION
Inventor： Takumi Hayashi , Rena Takahashi , Hayato Ochi
CPC classification number: H01J35/065 , H01J1/304 , H01J19/24 , H01J35/064 , H01J2235/062 , H01J2235/064
Abstract: Opening edge surface (45a) of an emitter supporting unit female screw bore (45) provided at an emitter supporting unit (4) extends along radial direction of the emitter supporting unit female screw bore (45). An emitter supporting unit operation hole (32) provided at a flange portion (30a) of a vacuum enclosure (11) has shape into which one selected from a position adjustment shaft (6) and a pressing shaft (9) can be inserted from their shaft tip sides. The position adjustment shaft is provided, on an outer circumferential surface of its tip (61), with a tip side male screw portion (61a) that can be screwed into the emitter supporting unit female screw bore (45). The pressing shaft has, at its tip (91), a tip surface (91a) having a larger diameter than an opening diameter of the emitter supporting unit female screw bore (45) and extending along radial direction of the pressing shaft.
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Patent Agency Ranking
公开(公告)号：US20240055215A1
公开(公告)日：2024-02-15
申请号：US18232418
申请日：2023-08-10
Applicant: X-SIGHT INCORPORATED
Inventor： Winston Chern
CPC classification number: H01J35/153 , H01J35/065 , H01J35/16 , H01J35/147
Abstract: 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：US11872068B2
公开(公告)日：2024-01-16
申请号：US17290815
申请日：2019-10-29
Applicant: SOCPRA SCIENCES ET GÉNIE S.E.C.
Inventor： Rejean Fontaine , Julien Rossignol , Yves Bérubé-Lauzière
CPC classification number: A61B6/483 , A61B6/4085 , A61B6/4241 , G01T1/17 , H01J35/065 , H05G1/085
Abstract: The X-ray imager combines a pulsed X-ray source with a time-sensitive X-ray detector to provide a measure of ballistic photons with a reduction of scattered photons. The imager can provide a comparable contrast-to-noise X-ray image using significantly less radiation exposure than conventional X-ray imagers, notably about half of the radiation.
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公开(公告)号：US11776785B2
公开(公告)日：2023-10-03
申请号：US18007860
申请日：2021-05-26
Applicant: MEIDENSHA CORPORATION
Inventor： Hayato Ochi , Rena Takahashi
CPC classification number: H01J35/065 , H01J35/16 , H01J37/32532
Abstract: A vacuum container is configured so that an opening on one side and an opening on another side in the longitudinal direction of a cylindrical insulating body are sealed with an emitter unit and a target unit respectively; and a vacuum chamber is provided on the inner peripheral side of the insulating body. The emitter unit is provided with: a moving body located on the one side in the longitudinal direction in the vacuum chamber and supported so as to be movable in the longitudinal direction via a bellows; and a guard electrode located on the outer peripheral side of the moving body. An emitter section having an electron generating section is formed at a tip section of the moving body on the other side in the longitudinal direction by subjecting the surface of the tip section to film formation processing.
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公开(公告)号：US20230197395A1
公开(公告)日：2023-06-22
申请号：US18008016
申请日：2021-05-26
Applicant: MEIDENSHA CORPORATION
Inventor： Takumi HAYASHI , Rena TAKAHASHI , Hayato OCHI
IPC: H01J35/06
CPC classification number: H01J35/064 , H01J35/065 , H01J2235/064
Abstract: opening edge surface (45a) of an emitter supporting unit female screw bore (45) provided at an emitter supporting unit (4) extends along radial direction of the emitter supporting unit female screw bore (45). An emitter supporting unit operation hole (32) provided at a flange portion (30a) of a vacuum enclosure (11) has shape into which one selected from a position adjustment shaft (6) and a pressing shaft (9) can be inserted from their shaft tip sides. The position adjustment shaft is provided, on an outer circumferential surface of its tip (61), with a tip side male screw portion (61a) that can be screwed into the emitter supporting unit female screw bore (45). The pressing shaft has, at its tip (91), a tip surface (91a) having a larger diameter than an opening diameter of the emitter supporting unit female screw bore (45) and extending along radial direction of the pressing shaft.
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公开(公告)号：US20190189383A1
公开(公告)日：2019-06-20
申请号：US16285475
申请日：2019-02-26
Applicant: NANOX IMAGING PLC
Inventor： KOICHI IIDA , HIDENORI KENMOTSU , JUN YAMAZAKI , HITOSHI MASUYA
IPC: H01J3/14 , H01J35/14 , H01J1/304 , H01J3/02 , H01J29/46 , G01N23/046 , H01J35/06 , H01J31/12 , G01T1/161
CPC classification number: H01J35/065 , G01N23/046 , G01N2223/204 , G01N2223/419 , G01T1/161 , H01J1/3042 , H01J3/021 , H01J3/027 , H01J3/14 , H01J29/467 , H01J31/127 , H01J35/14 , H01J2235/068
Abstract: Controlling total emission current of an electron emitting construct in an x-ray emitting device by providing a cathode, providing multiple active areas each active area having a gated cone electron source, including multiple emitter tips arranged in an array, a gate electrode, and a gate interconnect lead connected to the gate electrode, providing an x-ray emitting construct comprising an anode, the anode being an x-ray target, situating the x-ray emitting construct facing the active areas face each other, selecting a set of active areas, and activating selected active areas by conductively connecting a voltage source to their associated the gate electrode interconnect lead.
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