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    Electron gun device
    1.
    发明申请
    Electron gun device 有权

    公开(公告)号：US20250157778A1

    公开(公告)日：2025-05-15

    申请号：US18947358

    申请日：2024-11-14

    Applicant: Comet AG

    Inventor： Daniel DEUTSCHBAUER ,  Matthew Price ,  Michael CHABIOR

    IPC: H01J35/06 ,  H01J9/18

    Abstract: An electron gun device, in particular for an X-ray tube, includes a metallic first electrode having a first electrode contact surface; a metallic second electrode having a second electrode contact surface; and a ring-shaped ceramic insulator having a first insulator contact surface on a first side with respect to an axial direction of the insulator and a second insulator contact surface on an opposite second side with respect to the axial direction. In an assembled state, the first insulator contact surface faces the first electrode contact surface and is connected to the first electrode contact surface via a first brazing joint, and the second insulator contact surface faces the second electrode contact surface and is connected to the second electrode contact surface via a second brazing joint.

    X-ray tube with inner-collimator
    2.
    发明授权
    X-ray tube with inner-collimator 有权

    公开(公告)号：US12283450B2

    公开(公告)日：2025-04-22

    申请号：US18104859

    申请日：2023-02-02

    Applicant: Moxtek, Inc.

    Inventor： Kasey Otho Greenland ,  Todd S. Parker ,  Rick Steck

    IPC: H01J35/18 ,  H01J35/06

    Abstract: An x-ray tube can include an x-ray window sealed to a mount. An inner-collimator can be adjacent to, but not sealed to, the x-ray window. The inner-collimator can be sandwiched between the x-ray window and an insulating-layer. The insulating-layer can span an inner-collimator-aperture of the inner-collimator, forming an isolated cavity at the inner-collimator-aperture. Walls of the cavity can include the x-ray window, the inner-collimator, and the insulating-layer. The x-ray tube can have a light weight, can block x-rays in undesirable directions, and can shape the x-ray beam.

    X-ray system with field emitters and arc protection
    5.
    发明授权
    X-ray system with field emitters and arc protection 有权

    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.

    X-ray tube with distributed filaments
    6.
    发明授权
    X-ray tube with distributed filaments 有权

    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.

    ELECTRIC FIELD EMISSION DEVICE
    7.
    发明申请
    ELECTRIC FIELD EMISSION DEVICE 有权

    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.

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