公开(公告)号：US12230468B2

公开(公告)日：2025-02-18

申请号：US17855739

申请日：2022-06-30

Applicant: Varex Imaging Corporation

Inventor： Dave Kirkham ,  Colton B. Woodman

IPC: H01J35/06 ,  H01J35/08 ,  H01J35/14

Abstract: An x-ray tube, comprising: a field emitter including an emission surface; an anode; and a focus electrode disposed between the field emitter and the anode; wherein: the focus electrode includes: a first surface that is substantially perpendicular to the field emitter emission surface and nearest to the field emitter; a second surface that is axially nearest to the anode, wherein the field emitter and the anode form an axis; and a third surface that extends between the first surface and the second surface; and a first location on the focus electrode between the first surface and the third surface is further from the anode than a second location on the focus electrode between the third surface and the second surface.

公开(公告)号：US12198887B2

公开(公告)日：2025-01-14

申请号：US17877037

申请日：2022-07-29

Applicant: John Thomas Canazon

Inventor： John Thomas Canazon

IPC: H01J35/14 ,  H01J35/06 ,  H01J35/16 ,  H05G1/02 ,  G21K5/10

Abstract: An x-ray generating unit includes an x-ray tube that is substantially transparent to x-rays. A cathode is within the x-ray tube and defines a plurality of spaced apart cavities. An anode includes a material that emits x-rays when impacted by electrons. A plurality of filaments is each disposed in a different one of the cavities. Each of the filaments is electrically coupled to each other and to an activating voltage source in parallel. Each of the filaments emits a focused electron beam directed to a different predetermined spot on the anode upon application of a predetermined voltage between the cathode and the anode, thereby causing the anode to generate x-rays. Each of the plurality of spaced apart cavities is aimed at the anode so that each predetermined spot on the anode is separated from each other spot by a gap that is not impacted by an electron beam.

公开(公告)号：US20250014853A1

公开(公告)日：2025-01-09

申请号：US18711014

申请日：2022-09-01

Applicant: MEIDENSHA CORPORATION ,  WASEDA UNIVERSITY

Inventor： Hayato OCHI ,  Rena TAKAHASHI ,  Suguru NODA ,  Kotaro YASUI ,  Hisashi SUGIME

IPC: H01J35/04 ,  H01J35/06

Abstract: An electric field emission device includes a vacuum vessel configured to include a vacuum chamber; an emitter positioned on one side in an axial direction of the chamber and including an electron generation portion facing another side in the axial direction; a target positioned on the other side of the chamber and facing the emitter; a guard electrode that is a cylindrical body, is fixed to the vacuum vessel, and has an opening portion; a support to move the emitter in the axial direction on an inner side of the guard electrode; and an electric field shield body formed of a conductor connected to the guard electrode. The electric field shield body partially overlaps the opening portion on a projection plane in the axial direction, and is formed in a shape partitioning the opening portion into a plurality of areas.

公开(公告)号：US12183536B2

公开(公告)日：2024-12-31

申请号：US17558408

申请日：2021-12-21

Applicant: GE Precision Healthcare LLC

Inventor： Kevin Kruse

IPC: H01J35/06 ,  H01J1/20 ,  H01J3/02 ,  H01J9/04 ,  H01J35/14 ,  H01J37/075

Abstract: Various methods and systems are provided for a cathode of an X-ray imaging system. A method for fabricating the cathode comprises machining a plurality of focusing features on a focusing element and welding the focusing element to a base assembly.

公开(公告)号：US12154751B2

公开(公告)日：2024-11-26

申请号：US17953706

申请日：2022-09-27

Applicant: Siemens Healthcare GmbH

Inventor： Marcus Radicke

IPC: H01J35/14 ,  A61B6/00 ,  A61B6/40 ,  A61B6/58 ,  H01J35/06 ,  H01J35/30 ,  H05G1/52

Abstract: One or more example embodiments relates to a system for calibration and/or for quality control of an FFS X-ray system, a corresponding FFS X-ray system, a control facility suitable for it and to a method for calibration and/or for quality control of the FFS X-ray system.

公开(公告)号：US20240371819A1

公开(公告)日：2024-11-07

申请号：US18760072

申请日：2024-07-01

Applicant: NANO-X IMAGING LTD

Inventor： Ukyo JEONG ,  Ghiyuun KANG

IPC: H01L23/00 ,  H01J9/02 ,  H01J35/06

Abstract: A chip mounted field emitter array method for their fabrication by applying sintering to bind a substrate die to other die layers. Metal powder is applied to the bonding surface of the die, covered with the chip carrier or chip and compressed between two heated plates. The bonding pads of the die may be conductively coupled to corresponding bonding pads of the other die layers.

公开(公告)号：US20240347307A1

公开(公告)日：2024-10-17

申请号：US18036762

申请日：2021-11-19

Applicant: COMET HOLDING AG

Inventor： Adrian Riedo

IPC: H01J35/06 ,  H01J9/385 ,  H01J9/40 ,  H01J35/20

CPC classification number: H01J35/064 ,  H01J9/385 ,  H01J9/40 ,  H01J35/20

Abstract: An X-ray tube includes a vacuum-sealed tube housing evacuated to a pressure of 10−7 mbar or lower, a cathode assembly inside the housing including an electron emitter adapted to emit electrons when heated at a temperature included in a defined working temperature range and at least one component containing carbon in an amount of at least 20% by weight, especially at least 30% by weight, even more especially at least 50% by weight, the at least one component being preferably designed for holding the emitter, and an anode assembly inside the housing including a target layer for receiving electrons emitted by the electron emitter, wherein the electron emitter preferably includes boride, preferably lanthanum hexaboride (LaB6), and wherein the cathode assembly is designed such that if the emitter temperature is included in the working temperature range.

公开(公告)号：US20240312754A1

公开(公告)日：2024-09-19

申请号：US18183338

申请日：2023-03-14

Applicant: The Boeing Company

Inventor： Michael K. Strahan ,  Kyle Eversole

IPC: H01J35/06 ,  H01J19/44 ,  H01J23/07

CPC classification number: H01J35/06 ,  H01J19/44 ,  H01J23/07

Abstract: An electron beam vacuum tube assembly is provides. The electron beam vacuum tube assembly comprises an anode assembly and a cathode assembly. A composite insulator tube provides electrical isolation between the anode assembly and cathode assembly, wherein the anode assembly, cathode assembly, and composite insulator are detachably connected each other.

公开(公告)号：US20240284579A1

公开(公告)日：2024-08-22

申请号：US18582963

申请日：2024-02-21

Applicant: Xelera Research LLC

Inventor： Bruce Dunham ,  John Scott Price

IPC: H05G1/02 ,  H01J35/06 ,  H01J35/16

CPC classification number: H05G1/025 ,  H01J35/06 ,  H01J35/16 ,  H01J2235/1216

Abstract: An x-ray device may include a target that emits x-rays when subjected to electrons, an electron source configured to emit electrons toward the target, an elongated annular first shell connected to and supporting the electron source, and an elongated annular second shell connected to and supporting the target. The first shell and the second shell may be arranged one radially inside the other.

公开(公告)号：US20240266136A1

公开(公告)日：2024-08-08

申请号：US18623938

申请日：2024-04-01

Applicant: MICRO-X LIMITED

Inventor： Robert C. SHEEHY ,  Brian GONZALES ,  Peter YARON ,  Anthony SKEATS ,  Steven TREWARTHA ,  Susanne SAHLOS ,  Gandalf DU PREEZ

IPC: H01J35/06 ,  B82Y15/00 ,  B82Y40/00 ,  C01B32/158 ,  H01J9/02

CPC classification number: H01J35/065 ,  C01B32/158 ,  H01J9/025 ,  B82Y15/00 ,  B82Y40/00 ,  H01J2201/30469

Abstract: The present invention relates to large area field emission devices based on the incorporation of macroscopic, microscopic, and nanoscopic field enhancement features and a designed forced current sharing matrix layer to enable a stable high-current density long-life field emission device. The present invention pertains to a wide range of field emission sources and is not limited to a specific field emission technology. The invention is described as an X-ray electron source but can be applied to any application requiring a high current density electron source.