Construction and test of a transition-radiation detector prototype based on thick gas electron multiplier technology
Construction and test of a transition-radiation detector prototype based on thick gas electron multiplier technology
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DOI：
10.1088/1748-0221/18/01/p01024
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发表时间：
2023-01
影响因子：
1.3
通讯作者：
G. Song;Yiding Zhao;M. Shao;Yi Zhou;Jianbei Liu;Zhiyong Zhang
中科院分区：
文献类型：
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作者：
G. Song;Yiding Zhao;M. Shao;Yi Zhou;Jianbei Liu;Zhiyong Zhang
渡越辐射探测器（TRD）是一种强有力的相对论电子（γ ≥ 1，000）识别装置。在电子-离子对撞机（EIC）探测器中，电子识别是标记出射散射电子的关键。在EIC探测器的电子前向区采用TRD可以提供在宽动量范围内具有高强子排斥的必要的电子识别。厚层气体电子倍增器（THGEM）技术由于其高粒度结构、抗辐射性、高倍率性能和易于大面积生产等特点，适合于现代高能实验中的辐射探测。本研究借由软X光与电子束实验，探讨以THGEM技术为基础之TRD原型。Geant 4模拟被广泛利用，以了解TRD原型与不同的气体混合物的操作。特别是，TRD原型的性能与电子束在DESY，与氩基气体，而不是氙基气体，同意以及在所有重要方面的模拟分析。基于实验和模拟结果的一致性，对氙基工作气体中模拟总能量存款的似然性分析表明，通过优化探测器设计、读出电子学和识别算法，可以提高π介子的抑制率。
A transition-radiation detector (TRD) is a powerful device for highly relativistic electron (γ ≳ 1,000) identification. Electron identification is crucial for tagging the outgoing scattered electrons in an electron-ion collider (EIC) detector. Employing a TRD at the electron forward region of an EIC detector can provide the necessary electron identification with high hadron rejection over a wide momentum range. Thick gas electron multiplier (THGEM) technology is suitable for radiation detection in modern high-energy experiments owing to its high-granularity structure, radiation hardness, high-rate capability and ease of large-area production. This study investigates a TRD prototype based on THGEM technology through soft X-ray and electron beam experiments. Geant4 simulation were extensively exploited to understand the operation of TRD prototype with different gas mixtures. Particularly, the performance of TRD prototype with an electron beam at the DESY, with argon-based gas rather than xenon-based gas, agreed well with the simulation analyses in all important aspects. Based on the consistency of the experimental and simulation results, a likelihood analysis on the simulated total energy deposit in the xenon-based working gas would suggest a pion rejection improvement with the optimization of detector design, readout electronics and identification algorithm.