Impact of trace amounts of water on the stability of Micro-Pattern Gaseous Detectors measured in Ar-CO2 (90-10)

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-08-06 DOI:10.1016/j.nima.2025.170912

H. Fribert , L. Fabbietti , P. Gasik , B. Ulukutlu

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引用次数: 0

Abstract

In this study, we investigate the influence of humidity on the performance of various non-resistive Micro Pattern Gaseous Detectors, such as GEM, Thick-GEM, and Micromegas, operated with Ar-CO

_{2}

(90-10) gas mixture. The water content is introduced in a range of 0–5000 ppm˙V. It is observed that the presence of increased humidity does not significantly degrade any of the studied performance criteria. On the contrary, our measurements suggest an improvement in discharge stability with increasing humidity levels at the highest gains and fields. No significant difference is observed at the lower gains, indicating that humidity helps to reduce the rate of spurious discharges related to electrode defects or charging-up of the insulating layers. We conclude that adding a small amount of water to the gas mixture may be beneficial for the stable operation of an MPGD.

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微量水对Ar-CO2微模式气体探测器稳定性的影响（90-10）

在这项研究中，我们研究了湿度对各种非电阻微模式气体探测器（如GEM， thick_gem和Micromegas）性能的影响，这些探测器使用Ar-CO2（90-10）气体混合物。水的含量在0-5000 ppm˙V的范围内引入。可以观察到，湿度增加的存在不会显著降低所研究的任何性能标准。相反，我们的测量表明，在最高增益和田间，随着湿度水平的增加，放电稳定性有所改善。在较低的增益处没有观察到显著的差异，这表明湿度有助于降低与电极缺陷或绝缘层充电有关的虚假放电率。我们得出结论，在气体混合物中加入少量的水可能有利于MPGD的稳定运行。

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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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.