Devices and methods for producing multiple X-ray beams from multiple locations
    1.
    发明申请
    Devices and methods for producing multiple X-ray beams from multiple locations 审中-公开
    用于从多个位置生产多个X射线束的装置和方法

    公开(公告)号:US20040240616A1

    公开(公告)日:2004-12-02

    申请号:US10448144

    申请日:2003-05-30

    CPC classification number: H01J35/065 H01J2235/068

    Abstract: A multi-beam x-ray generating device includes a stationary field-emission cathode having a plurality of stationary and individually controllable electron-emitting pixels disposed in a predetermined pattern on the cathode, an anode opposing the cathode comprising a plurality of focal spots disposed in a predetermined pattern that corresponds to the predetermined pattern of the pixels, and a vacuum chamber enveloping the anode and cathode. An additional construction is in the form of an a x-ray generating device including a stationary field-emission cathode, the cathode having a planar surface with an electron-emissive material disposed on at least a portion thereof, a gate electrode disposed in parallel spaced relationship relative to the planar surface of the cathode, the gate electrode having a plurality of openings having different sizes, an anode opposing the cathode and spaced therefrom, the anode having a plurality of focal spots aligned with the electron-emissive material, and a vacuum chamber enveloping the anode and cathode, wherein the gate electrode is operable such that the openings can be manipulated to bring at least one beam of electrons emitted from the cathode into and out of registry with at least one of the focal spots. Associated methods are also described.

    Abstract translation: 多光束X射线产生装置包括具有以阴极上预定图案设置的多个静止和可单独控制的电子发射像素的固定场致发射阴极,与阴极相对的阳极,包括多个焦斑, 对应于像素的预定图案的预定图案,以及包围阳极和阴极的真空室。 附加结构是包括固定场致发射阴极的x射线产生装置的形式,阴极具有设置在其至少一部分上的电子发射材料的平坦表面,平行间隔设置的栅电极 所述栅电极具有多个具有不同尺寸的开口,与所述阴极相对并与之隔开的阳极,所述阳极具有与所述电子发射材料对准的多个焦点,以及真空 室包围阳极和阴极,其中栅极电极可操作,使得可以操纵开口以使至少一个从阴极发射的电子束进入和离开与至少一个焦点的对准。 还描述了相关方法。

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