微电阻沟槽探测器:新型紧凑型单放大级 MPGD

Xiangqi Tian, Siqi He, Yi Zhou, M. Shao, Jianbei Liu, Zhiyong Zhang, Lunlin Shang, Xu Wang
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引用次数: 0

摘要

本文介绍了一种新型单放大级微图案气态探测器(MPGD),它在微凹槽结构的底部集成了一个基于类金刚石碳(DLC)的电阻电极,即微电阻凹槽(μRGroove)探测器。μRGroove与微电阻井(μRWELL)探测器具有类似的紧凑堆栈几何结构,但它的不同之处在于采用了用于电荷放大的沟槽结构而不是井。凹槽的顶部金属层自然形成一个条带阵列。通过在 DLC 电极下方加入额外的一维(1D)读出条,可以轻松实现二维(2D)条状读出方案。2022 年,欧洲核子研究中心制造了两个 μRGroove 原型(10 厘米×10 厘米),并通过 X 射线和光束测试对其性能进行了评估。结果表明,气体增益大于 104,能量分辨率约为 25%,对 8 千伏铜 X 射线的充电效应可忽略不计。此外,对于 150 GeV/c µ 介子,其探测效率约为 95%,位置分辨率为 ∼ 75 μm。μRGroove 拥有紧凑的设计和抗放电能力。此外,与 μRWELL 相比,它还能节省探测器的制造成本,并能在相同气体增益下产生更高的信号幅度(约两倍)。这些特性使 μRGroove 成为大面积、低材料预算跟踪应用的理想选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The micro-resistive groove detector: a new compact single amplification-stage MPGD
In this paper, we introduce a novel single amplification-stage Micro-Pattern Gaseous Detector (MPGD) that incorporates a Diamond-Like Carbon (DLC)-based resistive electrode at the bottom of micro-groove structures, the micro-Resistive Groove (μRGroove) detector. The μRGroove shares a similar compact stack geometry with the micro-Resistive WELL (μRWELL) detector, but it distinguishes itself by employing a groove structure for charge amplification instead of a well. The top metal layer of the grooves naturally forms an array of strips. By incorporating additional 1-dimensional (1D) readout strips beneath the DLC electrode, a 2-dimensional (2D) strip-readout scheme can be easily implemented. Two prototypes of the μRGroove (10 cm× 10 cm) were manufactured in 2022 at CERN, and their performance was evaluated through X-ray and beam tests. The results indicate a gas gain > 104, an energy resolution of ~ 25%, and negligible charging-up effects for 8 keV Cu X-rays. Additionally, the detection efficiency was found to be ~ 95%, with a position resolution of ∼ 75 μm for 150-GeV/c muons. The μRGroove boasts a compact design and robustness against discharges. Furthermore, compared to the μRWELL, it offers cost savings in detector fabrication and yields significantly higher signal amplitude (approximately double) at the same gas gain. These attributes position the μRGroove as a promising candidate for large-area and low-material-budget tracking applications.
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