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    Ion chamber with a flat sensitivity response characteristic
    131.
    发明授权
    Ion chamber with a flat sensitivity response characteristic 失效
    离子室具有平坦的灵敏度响应特性

    公开(公告)号：US4590401A

    公开(公告)日：1986-05-20

    申请号：US469869

    申请日：1983-02-25

    Applicant: Norman P. Goldstein ,  Alex D. Service ,  William H. Todt

    Inventor： Norman P. Goldstein ,  Alex D. Service ,  William H. Todt

    IPC: G01T1/185 ,  H01J47/02 ,  H01J47/08

    CPC classification number: H01J47/02

    Abstract: An ion chamber exhibiting a flat response to a wide range of incident gamma energy is provided by a high-pressure fill gas mixture of a first major constituent, low atomic number gas which exhibits a reduced gamma response at low gamma energy levels, and a second minor constituent, high atomic number gas which exhibits an increased gamma response at low gamma energy levels. The preferred fill gas mixture is nitrogen as the major constituent and xenon as the minor constituent.

    Abstract translation: 对于宽范围的入射伽马能量呈现平坦响应的离子室由第一主要成分的高压填充气体混合物提供，第一主要组分低原子序数气体在低伽马能级下表现出较低的γ响应， 次要成分，高原子序数气体，其在低γ能级下表现出增加的γ响应。 优选的填充气体混合物是氮气作为主要成分，氙气作为次要成分。

    Dead time compensation circuit
    132.
    发明授权
    Dead time compensation circuit 失效
    死区补偿电路

    公开(公告)号：US4419579A

    公开(公告)日：1983-12-06

    申请号：US237254

    申请日：1981-02-23

    Applicant: Philip C. East

    Inventor： Philip C. East

    IPC: G01T1/17 ,  H01J47/08

    CPC classification number: G01T1/171

    Abstract: This invention relates to a dead time compensation circuit for a radiation detector using a Geiger-Muller tube. The Geiger-Muller tube is the most commonly used detector for measuring gamma radiation. However, they have a restricted linear range which makes it difficult to use them with digital numeric displays. The highest dose rate that can be measured is limited by the tube dead time, i.e. the interval after the initiation of a pulse during which a subsequent ionizing event does not produce a pulse. The present invention adds one or more pulses to the display counter when the Geiger-Muller tube provides two or more pulses in a given time interval (t). The dose rate or count rate is sampled at the beginning of each counting period (T) and the interval t is made proportional to the count rate. At low count rates, where dead time losses are negligible, no pulses are added. At high count rates, where t can be several times the tube dead time, counting losses of 50% can be compensated.

    Abstract translation: 本发明涉及一种使用Geiger-Muller管的放射线检测器的死区时间补偿电路。 Geiger-Muller管是用于测量伽马辐射的最常用的检测器。 然而，它们具有有限的线性范围，这使得它们难以用数字数字显示器使用。 可以测量的最高剂量率受管死区时间的限制，即在随后的电离事件不产生脉冲的脉冲开始之后的间隔。 当Geiger-Muller管在给定的时间间隔（t）中提供两个或更多个脉冲时，本发明将一个或多个脉冲添加到显示计数器。 在每个计数周期（T）的开始处采样剂量率或计数率，并且使间隔t与计数率成比例。 在低计数率下，死区时间损失可以忽略不计，不加脉冲。 在高计数率下，t可以是管死区时间的几倍，可以补偿50％的计数损失。

    Geiger-Mueller tube with tungsten liner
    133.
    发明授权
    Geiger-Mueller tube with tungsten liner 失效
    盖格 - 米勒管与钨衬

    公开(公告)号：US4359661A

    公开(公告)日：1982-11-16

    申请号：US182375

    申请日：1980-08-29

    Applicant: Nicolas Mitrofanov

    Inventor： Nicolas Mitrofanov

    IPC: H01J47/08 ,  H01J17/06

    CPC classification number: H01J47/08

    Abstract: A highly sensitive Geiger-Mueller radiation detector with improved temperature stability and working life uses a cathode liner made of tungsten. The liner is resistant to attack by the halogen quench gases which are used in the detector. The method of conditioning the tube for use is much simpler and less expensive than it is for existing tubes.

    Abstract translation: 高灵敏度的Geiger-Mueller辐射探测器具有改善的温度稳定性和使用寿命，使用钨制阴极衬套。 衬垫耐受在检测器中使用的卤素骤冷气体的攻击。 调节使用管的方法比现有管更简单和更便宜。

    Gamma-ray compensated ionization chamber
    134.
    发明授权
    Gamma-ray compensated ionization chamber 失效
    伽马射线补偿电离室

    公开(公告)号：US4302696A

    公开(公告)日：1981-11-24

    申请号：US56265

    申请日：1979-07-10

    Applicant: Naoaki Wakayama ,  Toshimasa Tomoda ,  Shinji Fukakusa

    Inventor： Naoaki Wakayama ,  Toshimasa Tomoda ,  Shinji Fukakusa

    IPC: H01J47/02 ,  G01T1/185 ,  G01T3/00 ,  H01J47/12 ,  H01J47/08

    CPC classification number: H01J47/1216

    Abstract: A gamma-ray compensated ionization chamber having cylindrical multiplex electrodes comprises first cylindrical multiplex electrodes and second cylindrical multiplex electrodes being arranged in reverse orders to that of the first cylindrical multiplex electrodes in the longitudinal direction of the cylindrical electrodes to prevent the deterioration of compensating characteristics caused by the variation of an external temperature and variation of gamma-ray spectrum.

    Abstract translation: 具有圆柱形多路复用电极的伽马射线补偿电离室包括第一圆柱形多路复用电极和第二圆柱形多路复用电极，其与圆柱形电极的纵向方向上的第一圆柱形多路复用电极的顺序相反排列，以防止引起的补偿特性的劣化 通过外部温度的变化和伽马射线谱的变化。

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