A Novel Two-Dimensional Readout Design for Floating Strip Micromegas Detectors

F. Klitzner, O. Biebel, J. Bortfeldt, B. Flierl, M. Herrmann, R. Hertenberger
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Abstract

Floating strip Micromegas detectors are high-rate capable particle detectors with excellent spatial and time resolution, allowing single particle tracking with fluxes up to at least 7 MHz/cm2. The amplified ionization charge is collected on copper anode strips kept at a slightly floating electrical potential. The charge signal is coupled to two layers of perpendicular readout strips in x and y, insulated by thin Kapton layers. A complete understanding of the signal formation in the detector, particularly on the orthogonal y-strips, is achieved: simulations disentangle the signal coupling due to alternating weighting field lines with respect to the ion velocity vector and the response of charge sensitive front-end electronics. Different two-dimensional anode designs with optimized strip geometry have been developed based on the simulations. We present the performance of the detector for the different designs measured in 20 MeV proton/neutron and 180 GeV pion/muon beams, using APV25 front-end electronics.
浮式微细气体探测器的二维读出设计
浮动条Micromegas探测器是高速率的粒子探测器,具有出色的空间和时间分辨率,允许单个粒子跟踪,通量至少达到7 MHz/cm2。放大的电离电荷被收集在保持略微浮动电位的铜阳极带上。电荷信号耦合到x和y的两层垂直读出条带上,并由薄卡普顿层绝缘。对探测器中信号形成的完整理解,特别是在正交y形带上,实现了:模拟解开了由于相对于离子速度矢量和电荷敏感前端电子响应的交替加权场线引起的信号耦合。在模拟的基础上,提出了具有优化带形结构的二维阳极设计方案。本文介绍了采用APV25前端电子器件在20 MeV质子/中子和180 GeV介子/介子光束中测量的不同设计的探测器的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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