光电阴极
    3.
    发明公开

    公开(公告)号:CN101071704A

    公开(公告)日:2007-11-14

    申请号:CN200710126489.7

    申请日:2003-11-13

    CPC classification number: H01J1/34 H01J2201/342

    Abstract: 本发明涉及一个具有这样一种结构的光电阴极,它能够使低温时辐射灵敏度的下降得到抑制,从而改善信噪比。在该光电阴极中,一个光吸收层形成在衬底的上层。一个电子发射层形成在该光吸收层的上层。一个条纹状的接触层形成在该电子发射层的上层。由金属组成的一个表面电极形成在该接触层的表面。该接触层里的栅栏间距被调整为等于或大于0.2μm,且等于或小于2μm。

    光电阴极
    4.
    发明授权

    公开(公告)号:CN100347801C

    公开(公告)日:2007-11-07

    申请号:CN200310116390.0

    申请日:2003-11-13

    CPC classification number: H01J1/34 H01J2201/342

    Abstract: 本发明涉及一个具有这样一种结构的光电阴极,它能够使低温时辐射灵敏度的下降得到抑制,从而改善信噪比。在该光电阴极中,一个光吸收层形成在衬底的上层。一个电子发射层形成在该光吸收层的上层。一个条纹状的接触层形成在该电子发射层的上层。由金属组成的一个表面电极形成在该接触层的表面。该接触层里的栅栏间距被调整为等于或大于0.2μm,且等于或小于2μm。

    光电阴极
    5.
    发明公开

    公开(公告)号:CN1501424A

    公开(公告)日:2004-06-02

    申请号:CN200310116390.0

    申请日:2003-11-13

    CPC classification number: H01J1/34 H01J2201/342

    Abstract: 本发明涉及一个具有这样一种结构的光电阴极,它能够使低温时辐射灵敏度的下降得到抑制,从而改善信噪比。在该光电阴极中,一个光吸收层形成在衬底的上层。一个电子发射层形成在该光吸收层的上层。一个条纹状的接触层形成在该电子发射层的上层。由金属组成的一个表面电极形成在该接触层的表面。该接触层里的栅栏间距被调整为等于或大于0.2μm,且等于或小于2μm。

    RADIOTHERAPEUTICAL DEVICE AND USE THEREOF
    7.
    发明申请
    RADIOTHERAPEUTICAL DEVICE AND USE THEREOF 审中-公开
    放射治疗装置及其用途

    公开(公告)号:WO99062589A2

    公开(公告)日:1999-12-09

    申请号:PCT/IL1999/000299

    申请日:1999-06-03

    CPC classification number: A61N5/1001 H01J35/32 H01J2201/342 H01J2235/06

    Abstract: The present invention relates to miniaturized x-ray tubes, that enable radiation treatment by locating the x-ray source within a human body in close vicinity to or inside of the area to be treated with X-rays. Advantageously, the present invention eliminates most of the problems related to the methods based on a radioactive source and offers a method for efficient and controllable radiation treatment.

    Abstract translation: 本发明涉及通过将X射线源定位在人体内靠近X射线处理区域或其内部而进行放射治疗的小型化X射线管。 有利地,本发明消除了与基于放射源的方法相关的大多数问题,并且提供了一种用于有效和可控的辐射治疗的方法。

    PHOTOELECTRIC X-RAY TUBE
    8.
    发明申请
    PHOTOELECTRIC X-RAY TUBE 审中-公开
    光电X射线管

    公开(公告)号:WO1998005056A1

    公开(公告)日:1998-02-05

    申请号:PCT/US1997012686

    申请日:1997-07-18

    Abstract: An X-ray tube has an anode and a photocathode inside a vacuum envelope and an electron multiplier is disposed between them. Such an electron multiplier may be a plurality of sequentially disposed dynodes or a microchannel plate. Because of the secondary electron emission from the electron multiplier, a higher-power radiation is obtained without requiring a high optical power level to generate photoelectrons. The vacuum envelope may be of a rotary type with the anode and photocathode having annular regions.

    Abstract translation: X射线管在真空外壳内具有阳极和光电阴极,并且在它们之间设置电子倍增器。 这种电子倍增器可以是多个顺序设置的倍增电极或微通道板。 由于来自电子倍增器的二次电子发射,获得更高功率的辐射而不需要高的光功率水平来产生光电子。 真空外壳可以是具有阳极和光电阴极具有环形区域的旋转型。

    Miniature energy transducer for emitting x-ray radiation including schottky cathode
    9.
    发明授权
    Miniature energy transducer for emitting x-ray radiation including schottky cathode 有权
    用于发射包括肖特基阴极的X射线辐射的微型能量换能器

    公开(公告)号:US06463124B1

    公开(公告)日:2002-10-08

    申请号:US09596530

    申请日:2000-06-19

    Abstract: An apparatus provides in-situ radiation treating utilizing a miniature energy transducer to produce x-rays, wherein the energy transducer includes a Schottky cathode tip. More specifically, the energy transducer includes a transducer body, an anode provided at a first end of the transducer body, and a cathode provided at a second end of the transducer body opposite the anode. The energy transducer is coupled to an energy source by a flexible insertion device. The energy source provides electrical and/or light signals to the energy transducer via the flexible insertion device. Light transmitted from the energy source to the energy transducer by the flexible insertion device is focused on a Schottky cathode tip of the cathode by the optical fiber provided in the hollow core of the anode. The application of the light signal to the cathode tip results in heating of the tip and along with the electric field generated by the acceleration voltage it leads to electron Schottky emission and electron acceleration towards the anode. In another preferred embodiment, an electrical current, transmitted from the energy source to the energy transducer by the flexible insertion device, is applied to the Schottky cathode tip of the cathode, causing thermo-emission. The electrons generated due to this process are accelerated towards the anode across a voltage difference between the anode and the cathode.

    Abstract translation: 一种装置利用微型能量换能器提供原位辐射处理以产生X射线,其中能量换能器包括肖特基阴极尖端。 更具体地,能量换能器包括换能器主体,设置在换能器主体的第一端的阳极和设置在换能器本体的与阳极相对的第二端的阴极。 能量传感器通过柔性插入装置耦合到能量源。 能量源通过柔性插入装置向能量换能器提供电和/或光信号。 通过柔性插入装置从能量源传递到能量换能器的光通过设置在阳极中空芯中的光纤聚焦在阴极的肖特基阴极尖端上。 将光信号施加到阴极尖端导致尖端的加热以及由加速电压产生的电场,从而导致电子肖特基发射和朝向阳极的电子加速。 在另一个优选实施例中,通过柔性插入装置从能量源传递到能量换能器的电流被施加到阴极的肖特基阴极尖端,引起热发射。 由于该过程产生的电子在阳极和阴极之间的电压差上被朝向阳极加速。

    X-ray source with improved beam steering
    10.
    发明授权
    X-ray source with improved beam steering 失效
    具有改进的光束转向的X射线源

    公开(公告)号:US5442678A

    公开(公告)日:1995-08-15

    申请号:US184021

    申请日:1994-01-21

    Abstract: This invention is directed to an x-ray source comprising a housing, an elongated tubular probe, a target assembly, and a beam steering assembly. The housing encloses an electron beam source, and has elements for generating an electron beam along a beam path. The elongated tubular probe extends along a central axis from the housing about the beam path. The target assembly extends along the central axis and is adapted for coupling to the end of the probe distal form the housing. The target assembly includes a target element positioned along the beam path, wherein the target element is adapted to emit x-rays in a predetermined spectral range in response to incident electrons. The beam steering assembly includes a deflection element, a feedback network, and a deflection controller. The deflection element deflects the beam from a nominal axis to a selected surface region on the target element in response to a deflection control signal. The feedback network includes deflection sensing elements for sensing the deflection of the beam and elements for generating a feedback signal representative thereof. The deflection controller couples to the deflection element and to the feedback network and includes elements for generating a deflection control signal in response to the feedback signal.

    Abstract translation: 本发明涉及一种包括壳体,细长管状探针,目标组件和射束转向组件的X射线源。 壳体包围电子束源,并且具有用于沿着光束路径产生电子束的元件。 细长管状探针沿着中心轴线从壳体围绕光束路径延伸。 目标组件沿着中心轴线延伸并且适于从外壳的远端连接到探头的端部。 目标组件包括沿着光束路径定位的目标元件,其中目标元件适于响应入射电子在预定光谱范围内发射x射线。 光束转向组件包括偏转元件,反馈网络和偏转控制器。 响应于偏转控制信号,偏转元件将光束从标称轴偏转到目标元件上的选定表面区域。 反馈网络包括用于感测波束和元件的偏转的偏转感测元件,用于产生代表其的反馈信号。 偏转控制器耦合到偏转元件和反馈网络,并且包括用于响应于反馈信号产生偏转控制信号的元件。

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