与电阻板阳极耦合的THGEM中的信号形成及感应间隙优化
Signal formation and induction-gap optimization in a THGEM coupled to a resistive plate anode
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中文总结 AI 辅助
本文研究了与电阻板阳极耦合的THGEM探测器，确定最优感应间隙为0.2 mm，测得其在特定条件下的信号性能，建立新型配置并为粒子探测应用提供指导。
中文摘要 AI 辅助
本文首次采用Ar:CO₂（93:7）气体混合物，对与电阻板阳极耦合的厚型气体电子倍增器（THGEM）探测器开展研究。电阻阳极概念使探测器能在远小于常规THGEM探测器所用感应间隙的条件下稳定运行，为改善信号形成与定时性能提供了可能。研究系统分析了感应间隙对探测器电流及电荷信号特性的影响，基于多项关键信号参数确定最优感应间隙为0.2 mm。随后针对该最优配置，在不同电场设置下开展详细研究：当探测器受5.9 keV X射线辐照，且ΔV_THGEM=1900 V、ΔV_induction=100 V、漂移电场为1 kV/cm时，达到最高峰值振幅约56 μA，上升时间约5 ns；在相同工作条件下，探测宇宙缪子时测得时间分辨率约6.0 ns。本研究建立了新型THGEM探测器配置，为其在粒子探测系统中的潜在应用提供了指导，如缪子谱仪及数字强子量能器的采样元件。
英文摘要
A Thick Gaseous Electron Multiplier (THGEM) detector coupled to a resistive plate anode was investigated for the first time, using an Ar:CO$_2$ (93:7) gas mixture. The resistive anode concept enabled stable operation with induction gaps significantly smaller than those typically employed in THGEM detectors, opening the possibility of improving signal formation and timing performance. The effect of the induction gap on the detector current- and charge-signal characteristics was systematically investigated. An optimal induction gap of 0.2 mm was identified based on several key signal parameters. Subsequently, detailed studies were carried out for this optimal configuration under different electric-field settings. The detector achieved a highest peak amplitude of $\sim$56 $μ$A with a rise time of $\sim$5 ns at $Δ\text{V}_{\text{THGEM}}$=1900 V, $Δ\text{V}_{\text{induction}}$=100 V, and a drift field of 1 kV/cm when irradiated with 5.9 keV X-rays. Under the same operating conditions, a time resolution of $\sim$6.0 ns was measured detecting cosmic muons. This study establishes a new THGEM detector configuration and provides guidance for its potential application in particle-detection systems, such as muon spectrometers and sampling elements of digital hadronic calorimeters.
