X-ray contrast detection system
    8.
    发明授权
    X-ray contrast detection system 失效
    X射线对比度检测系统

    公开(公告)号:US3895232A

    公开(公告)日:1975-07-15

    申请号:US42453173

    申请日:1973-12-13

    CPC classification number: G01N23/083 G01V5/0016

    Abstract: A radiation detection device including a scintillation crystal in the form of a rod having photomultiplier devices affixed to either end which monitors the X-ray transmission characteristics of an object. Associated circuitry responds to the output signals developed by the photomultiplier tubes to map the transmission characteristics of the object. The use of a single rod-like scintillation crystal in combination with a pair of photomultiplier devices replaces the array of discrete simulator scintillation crystals typically employed to monitor objects for radiation emitting materials.

    Abstract translation: 一种放射线检测装置,包括呈杆形式的闪烁晶体,该闪烁晶体具有粘附到任一端的光电倍增器装置,该装置监测对象的X射线透射特性。 相关电路响应由光电倍增管开发的输出信号,以映射物体的传输特性。 使用单个棒状闪烁晶体与一对光电倍增器装置组合替代通常用于监测物体的辐射发射材料的离散模拟闪烁晶体阵列。

    Transmissive spongy secondary emitter
    10.
    发明授权
    Transmissive spongy secondary emitter 失效
    透射海绵二次发射体

    公开(公告)号:US3197662A

    公开(公告)日:1965-07-27

    申请号:US1439460

    申请日:1960-03-11

    Abstract: An electrode includes an electron or irradiation transmissive conducting layer and an electron-emissive layer of insulating material in spongy form. This layer may be of BaF2, LiF2, MgF2, MgO, Al2O2, CsI, KCl or NaCl and preferably has a density of only about 1% of the same material in bulk form, e.g. 0.01 to 0.1 gms. per cc. with a thickness of 10 to 100 m . The layer may be formed by deposition in a gaseous atmosphere, e.g. argon at 1 to 2 mm. of Hg pressure, with a spacing of about 3 inches between the evaporator and the receiver, which may be rotating. Alternatively magnesium may be burnt in air at atmospheric pressure about 14 inches from the receiver. The receiver may be an aluminium film supported by a metal ring and formed by vacuum deposition of aluminium on to a film of thermally removable cellulose nitrate to a thickness of 140 to 1000 . Specifications 792,507, 862,211 and 898,433 are referred to.

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