The gain in Thick GEM multipliers and its time-evolution
The gain in Thick GEM multipliers and its time-evolution
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DOI：
10.1088/1748-0221/10/03/p03026
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发表时间：
2015-03
影响因子：
1.3
通讯作者：
M. Alexeev;R. Birsa;F. Bradamante;A. Bressan;M. Büchele;M. Chiosso;P. Ciliberti;S. Torre;S. Das
中科院分区：
文献类型：
--
作者：
M. Alexeev;R. Birsa;F. Bradamante;A. Bressan;M. Büchele;M. Chiosso;P. Ciliberti;S. Torre;S. Das
在升级COMPASS RICH-1气体光子探测器的项目中，我们开展了一项研发计划，旨在开发基于厚宝石电子倍增器与CSI光电转换器耦合的多层布置的光子探测器。为此，对厚宝石进行了详细的表征，包括增益性能、它与几何参数的关系以及它的时间演化，这是具有开放绝缘体表面的气体探测器所表现出的一个特征。由于这种演变而产生的变化戏剧性地取决于参数本身。在这篇文章中，我们总结了致力于厚宝石收益及其随时间演变的研究结果。我们还包括一个定性模型，它解释了观测到的厚宝石增益随时间演化的特殊细节。
In the context of a project to upgrade the gas photon detectors of COMPASS RICH-1, we have performed an R&D programme aimed to develop photon detectors based on multi-layer arrangements of thick GEM electron multipliers coupled to a CsI photoconverter. For this purpose, thick GEMs have been characterised in detail including the gain performance, its dependance on the geometrical parameters and its time-evolution, a feature exhibited by the gas detectors with open insulator surfaces. The variation due to this evolution drammatically depends on the parameters themselves. In the present article we summarise the outcomes of the studies dedicated to the thick GEM gain and its evolution versus time. We also include a qualitative model which accounts for the peculiar details of the observed thick GEM gain time-evolution.