Measurement of low 222Rn concentration in N2 using an activated charcoal trap

IF 1.5 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 : 2025-03-18 DOI:10.1016/j.nima.2025.170422

N. Fatemighomi, Y. Ahmed, S.M.A. Hussain, J. Lu, A. Pearson, J. Suys

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引用次数: 0

Abstract

²²²Rn is a limiting background in many leading dark matter and low energy neutrino experiments. One way to mitigate ²²²Rn is to fill external experimental components with a clean cover gas such as N₂. At the SNOLAB facility in Canada, the ²²²Rn concentration in the cover gas systems of the experiments are monitored using a radon assay board developed by the SNO collaboration. To improve the sensitivity of N₂ radon assays, a new trapping mechanism based on activated charcoal has been developed. The trap was purified and tested at SNOLAB. Additionally, a radon calibration source from floor tiles was developed and characterized. This calibration source was used to measure the efficiency of the activated charcoal trap. The methods for determining the efficiency, background, and sensitivity of the trap are described.

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用活性炭捕集器测量N2中低222Rn浓度

222Rn是许多领先的暗物质和低能中微子实验的限制背景。缓解222Rn的一种方法是用清洁的覆盖气体（如N2）填充外部实验组件。在加拿大的SNOLAB设施，使用由SNO合作开发的氡分析板监测实验覆盖气体系统中的222Rn浓度。为了提高N2氡检测的灵敏度，提出了一种基于活性炭的新型捕集机制。对捕集器进行纯化并在SNOLAB进行测试。此外，开发了地砖氡校准源并对其进行了表征。该校准源用于测量活性炭捕集器的效率。描述了测定该捕集器的效率、本底和灵敏度的方法。

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.