Large resistive 2D Micromegas with genetic multiplexing and some imaging applications
Large resistive 2D Micromegas with genetic multiplexing and some imaging applications
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DOI：
10.1016/j.nima.2016.08.006
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发表时间：
2016-10-21
影响因子：
1.4
通讯作者：
Riallot, M.
中科院分区：
文献类型：
--
作者：
Bouteille, S.;Attie, D.;Riallot, M.
第一个大的电阻Micromegas探测器的性能与2D读出和基因复用。这些探测器的有效面积为50 x 50 cm（2），在X和Y方向上配备有1024个条带。在两个坐标上应用相同的基因多重模式，导致在2 X 61个读出通道上的信号压缩。欧洲核子研究中心已经建造了四个这样的探测器，并进行了广泛的宇宙学测试。阻性条形薄膜支持极高增益操作，可补偿2维上的电荷扩散以及1 nF输入电容引起的SIN损耗。由于电荷沿沿着电阻条排出，该膜还在X和Y坐标中产生显著不同的信号形状。总而言之，在1 cm的漂移间隙下实现了95%以上的检测效率。虽然还不是最佳的，测得的300克的空间分辨率允许非常精确的成像领域的μ子断层扫描，这些探测器的一些应用。(C)2016爱思唯尔B.V.保留所有权利。
The performance of the first large resistive Micromegas detectors with 2D readout and genetic multiplexing is presented. These detectors have a 50 x 50 cm(2) active area and are equipped with 1024 strips both in X- and Y-directions. The same genetic multiplexing pattern is applied on both coordinates, resulting in the compression of signals on 2 x 61 readout channels. Four such detectors have been built at CERN, and extensively tested with cosmics. The resistive strip film allows for very high gain operation, compensating for the charge spread on the 2 dimensions as well as the SIN loss due to the huge, 1 nF input capacitance. This film also creates a significantly different signal shape in the X- and Y-coordinates due to the charge evacuation along the resistive strips. All in all a detection efficiency above 95% is achieved with a 1 cm drift gap. Though not yet optimal, the measured 300 gm spatial resolution allows for very precise imaging in the field of muon tomography, and some applications of these detectors are presented. (C) 2016 Elsevier B.V. All rights reserved.