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    PLANAR FILAMENT WITH DIRECTED ELECTRON BEAM
    12.
    发明公开
    PLANAR FILAMENT WITH DIRECTED ELECTRON BEAM 审中-公开

    公开(公告)号：US20230360876A1

    公开(公告)日：2023-11-09

    申请号：US18340690

    申请日：2023-06-23

    Applicant: Moxtek, Inc.

    Inventor： Eric MILLER

    IPC: H01J35/06

    CPC classification number: H01J35/064

    Abstract: A planar filament 11f can include multiple materials to increase electron emission in desired directions and to suppress electron emission in undesired directions. The filament 11f can include a core-material CM between a top-material TM and a bottom-material BM. The top-material TM can have a lowest work function WFt; the bottom-material BM can have a highest work function WFb; and the core-material CM can have an intermediate work function WFc (WFt Wb). This shape makes it easier to coat the edges 31e with the bottom-material BM, because the edges 31e tilt toward and partially face the sputter target. This shape also helps direct more electrons to a center of the target 14, and reduce electron emission in undesired directions.

    X-ray tube
    14.
    发明授权
    X-ray tube 有权

    公开(公告)号：US12125661B2

    公开(公告)日：2024-10-22

    申请号：US17872782

    申请日：2022-07-25

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Yoon-Ho Song ,  Jun-Tae Kang ,  Jae-Woo Kim ,  Sora Park ,  Jin-Woo Jeong

    IPC: H01J35/06 ,  H01J35/04 ,  H01J35/10

    CPC classification number: H01J35/064 ,  H01J35/045 ,  H01J35/10

    Abstract: Provided is an X-ray tube including a cathode structure, an anode spaced apart from the cathode structure, a spacer structure disposed between the cathode structure and the anode, and an external power supply connected to each of the cathode structure, the anode, and the spacer structure. Here, the spacer structure includes a first spacer disposed adjacent to the cathode structure and a second spacer disposed on the first spacer and disposed adjacent to the anode. The first spacer includes a first portion adjacent to the cathode structure and a second portion adjacent to a contact point of the first spacer and the second spacer. The second spacer includes a third portion adjacent to the contact point and a fourth portion adjacent to the anode. Each of the first portion and the third portion has a volume resistivity less than that of the second portion.

    X-RAY TUBE
    15.
    发明公开
    X-RAY TUBE 审中-公开

    公开(公告)号：US20240339282A1

    公开(公告)日：2024-10-10

    申请号：US18744783

    申请日：2024-06-17

    Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.

    Inventor： Naoki TAKAHASHI

    IPC: H01J35/06

    CPC classification number: H01J35/066 ,  H01J35/064 ,  H01J2235/068

    Abstract: According to one embodiment, a cathode in which three electron guns are arranged in parallel with each other, each including a filament which emits electrons, a storage slot which stores the filament, and the three electron guns are constituted by a central electron gun which opposes the anode and electron guns, a central axis of the filament along a longitudinal direction at a center of the filament in a width direction thereof and a central axis of the storage slot along a longitudinal direction at a center of the storage slot in a width direction thereof, which coincide with each other, and a central axis of the focusing cup along a longitudinal direction at a center of the focusing cup in a width direction thereof that is displaced from the central axis of the filament.

    PLANAR FILAMENT WITH FOCUSED, CENTRAL ELECTRON EMISSION
    19.
    发明公开
    PLANAR FILAMENT WITH FOCUSED, CENTRAL ELECTRON EMISSION 审中-公开

    公开(公告)号：US20240021400A1

    公开(公告)日：2024-01-18

    申请号：US18333112

    申请日：2023-06-12

    Applicant: Moxtek, Inc.

    Inventor： Kasey Otho GREENLAND ,  Todd S. PARKER

    IPC: H01J35/06 ,  H01J35/08

    CPC classification number: H01J35/064 ,  H01J35/116

    Abstract: A planar filament for an x-ray tube can have a different cross-sectional area at different locations. In regions of smaller cross-sectional area, there can be higher current density, and thus increased heating and higher temperature of the wire. In regions of larger cross-sectional area, there can be lower current density, and thus decreased heating of the wire. Regions of larger cross-sectional area can also be stronger, thus reducing early filament failures. Wider regions can have increased area for electron emission. By adjusting the cross-sectional area and width of the wire at different locations, electron emission can be largely confined to a center of the filament, and filament life can increase.

    X-RAY TUBE WITH INNER-COLLIMATOR
    20.
    发明公开
    X-RAY TUBE WITH INNER-COLLIMATOR 审中-公开

    公开(公告)号：US20230282438A1

    公开(公告)日：2023-09-07

    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

    CPC classification number: H01J35/186 ,  H01J35/064 ,  H01J35/066

    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.

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