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    Coaxial anode wire for gas radiation counters
    61.
    发明授权
    Coaxial anode wire for gas radiation counters 失效
    用于气体辐射计的同轴阳极线

    公开(公告)号：US3812358A

    公开(公告)日：1974-05-21

    申请号：US37214873

    申请日：1973-06-21

    Applicant: NASA

    Inventor： FLETCHER J ,  KRAUSHAAR W

    IPC: H01J47/06 ,  G01T1/18 ,  H01J39/28

    CPC classification number: H01J47/06

    Abstract: A coaxial anode construction for a gas radiation counter is disclosed by which undesirable background ionization interference may be suppressed. The anode comprises an elongated central wire covered with an electrically insulating sleeve. A plurality of longitudinally discontinuous segments of an electrically conductive coating is disposed about the insulating sleeve in coaxial relationship to and along the length of the central wire. In the preferred inventive embodiment, the plurality of conductive coating segments define a so-called veto or rejection anode at each end portion of the central wire and a main or primary charge detecting anode disposed therebetween. Coupling means are connected to each of the segments such that the primary charge detecting anode is connected to detection circuitry in anti-coincidence with the veto anodes. Background radiation detected by either of the veto anodes and the primary charge detecting anode is therefore rejected and the sensitivity of the radiation counter device is increased.

    Proportional counter radiation camera
    62.
    发明授权
    Proportional counter radiation camera 失效
    比例计数器辐射摄像机

    公开(公告)号：US3786270A

    公开(公告)日：1974-01-15

    申请号：US3786270D

    申请日：1973-02-01

    Applicant: ATOMIC ENERGY COMMISSION

    Inventor： BORKOWSKI C ,  KOPP M

    IPC: H01J47/06 ,  G01T1/18

    CPC classification number: H01J47/06

    Abstract: A gas-filled proportional counter camera that images photon emitting sources has been provided. A two-dimensional, positionsensitive proportional multiwire counter is provided as the detector. The counter consists of a high voltage anode screen sandwiched between orthogonally disposed planar arrays of multiple parallel strung, resistively coupled cathode wires. Two terminals from each of the cathode arrays are connected to separate timing circuitry to obtain separate X and Y coordinate signal values from pulse shape measurements to define the position of an event within the counter arrays which may be recorded by various means for data display. The counter is further provided with a linear drift field which effectively enlarges the active gas volume of the counter and constrains the recoil electrons produced from ionizing radiation entering the counter to drift perpendicularly toward the planar detection arrays. A collimator is interposed between a subject to be imaged and the counter to transmit only the radiation from the subject which has a perpendicular trajectory with respect to the planar cathode arrays of the detector.

    Abstract translation: 已经提供了一种充满气体的比例计数器相机，用于对光子发射源进行成像。 提供二维，位置敏感的比例多线计数器作为检测器。 该计数器由夹在正交布置的多个并联串联电阻耦合的阴极线的平面阵列之间的高压阳极屏幕组成。 来自每个阴极阵列的两个端子连接到单独的定时电路，以从脉冲形状测量获得单独的X和Y坐标信号值，以定义可以通过用于数据显示的各种装置记录的计数器阵列内的事件的位置。 该计数器还设置有线性漂移场，其有效地扩大了计数器的活性气体体积，并限制了从电离辐射进入计数器产生的反冲电子垂直于平面检测阵列漂移。 将待成像的被摄体与计数器之间插入准直仪，以仅发射来自被检体的辐射，其具有相对于检测器的平面阴极阵列的垂直轨迹。

    Matrix-form proportional-mode radiation detector
    63.
    发明授权
    Matrix-form proportional-mode radiation detector 失效
    矩阵式比例模式辐射检测器

    公开(公告)号：US3654469A

    公开(公告)日：1972-04-04

    申请号：US3654469D

    申请日：1969-05-16

    Applicant: KANTOR FREDERICK W

    Inventor： KANTOR FREDERICK W

    IPC: G01T1/29 ,  H01J47/06 ,  G01T1/18

    CPC classification number: G01T1/2935 ,  H01J47/06

    Abstract: A matrix-form radiation detector, operating in the proportional gas mode, is provided for indicating the x and y coordinates of each ionizing event caused by the radiation. This information is utilized to form an image of the radiation pattern being detected. The detector has a plurality of cathodes arranged in columns and rows. The cathodes in each column are connected to one another, and those in each row are electrically isolated from one another. A plurality of anode wires is provided. Each cathode substantially encircles one of the anode wires, and each wire passes through all of the cathodes in a given row. Encoding circuitry and other means are provided for encoding the address of each ionizing event, and for storing and/or displaying the encoded information.

    Abstract translation: 提供以比例气体模式操作的矩阵式辐射检测器，用于指示由辐射引起的每个电离事件的x和y坐标。 该信息用于形成被检测的辐射图案的图像。 检测器具有以列和列排列的多个阴极。 每列中的阴极彼此连接，并且每列中的阴极彼此电隔离。 提供多个阳极线。 每个阴极基本上环绕一个阳极线，并且每条电线通过给定行中的所有阴极。 提供编码电路和其他装置，用于对每个电离事件的地址进行编码，以及用于存储和/或显示编码的信息。

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