Performances of Anode-resistive Micromegas for HL-LHC
Performances of Anode-resistive Micromegas for HL-LHC
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DOI：
10.1088/1748-0221/7/03/c03040
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发表时间：
2012-02
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通讯作者：
J. Manjarres;T. Alexopoulos;D. Attié;M. Boyer;J. Derré;G. Fanourakis;E. Ferrer-Ribas;J. Galán;E. Gazis;T. Geralis;A. Giganon;I. Giomataris;S. Herlant;F. Jeanneau;P. Schune;Maksym Titov;G. Tsipolitis
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作者：
J. Manjarres;T. Alexopoulos;D. Attié;M. Boyer;J. Derré;G. Fanourakis;E. Ferrer-Ribas;J. Galán;E. Gazis;T. Geralis;A. Giganon;I. Giomataris;S. Herlant;F. Jeanneau;P. Schune;Maksym Titov;G. Tsipolitis
Micromegas 技术是替代 Atlas 前向 μ 子室（跟踪和触发）的有前途的候选技术，用于未来 HL-LHC 实验的升级。背景和堆积事件概率的增加需要探测器性能，目前正在密集的研发活动中研究这些性能。我们研究了具有不同读出条间距的四种不同电阻式 Micromegas 探测器的性能。 2010 年秋季，这些室在 H6 CERN-SPS 光束线上使用约 120 GeV 动量π介子进行了测试。对于 500μm 的条带间距，我们测量到约 90 μm 的分辨率和约 98% 的效率。还研究了履带角对效率的影响。我们的结果表明，相对于标准 Micromegas，电阻技术不会导致效率或分辨率下降。在一些配置中，电阻涂层能够将放电电流减少至少100倍。
Micromegas technology is a promising candidate to replace Atlas forward muon chambers -tracking and trigger- for future HL-LHC upgrade of the experiment. The increase on background and pile-up event probability requires detector performances which are currently under studies in intensive RD activities. We studied performances of four different resistive Micromegas detectors with different read-out strip pitches. These chambers were tested using ~120 GeV momentum pions, at H6 CERN-SPS beam line in autumn 2010. For a strip pitch 500μm we measure a resolution of ~90 μm and a efficiency of ~ 98%. The track angle effect on the efficiency was also studied. Our results show that resistive techniques induce no degradation on the efficiency or resolution, with respect to the standard Micromegas. In some configuration the resistive coating is able to reduce the discharge currents at least by a factor of 100.