GEM: A new concept for electron amplification in gas detectors
GEM: A new concept for electron amplification in gas detectors
复制标题
DOI：
10.1016/s0168-9002(96)01172-2
复制
发表时间：
1997-02-21
影响因子：
1.4
通讯作者：
Sauli, F
中科院分区：
文献类型：
--
作者：
Sauli, F
我们介绍了气体电子倍增器(GEM)，这是一种由薄绝缘体隔开的两层金属层组成的复合栅格，上面刻有规则的开放沟道矩阵。将电极保持在适当的电势差上的宝石栅格插入漂移电子路径上的气体探测器，允许预放大流经通道的电荷。与其他器件、多线室或微带室相结合，它可以获得更高的增益，或在不太关键的条件下工作。灵敏体积和检测体积的分离还提供了其他优势：内置延迟、对光子反馈的强烈抑制。预计将在高速跟踪和切伦科夫环成像探测器中应用。多个宝石格栅组装成相同的气体体积，可以在一系列步骤中获得较大的有效放大系数。
We introduce the gas electrons multiplier (GEM), a composite grid consisting of two metal layers separated by a thin insulator, etched with a regular matrix of open channels. A GEM grid with the electrodes kept at a suitable difference of potential, inserted in a gas detector on the path of drifting electrons, allows to pre-amplify the charge drifting through the channels. Coupled to other devices, multiwire or microstrip chambers, it permits to obtain higher gains, or to operate in less critical conditions. The separation of sensitive and detection volumes offers other advantages: a built-in delay, a strong suppression of photon feedback. Applications are foreseen in high rate tracking and Cherenkov Ring Imaging detectors. Multiple GEM grids assembled in the same gas volume allow to obtain large effective amplification factors in a succession of steps.