Toward low gas consumption of muographic tracking detectors in field applications
Toward low gas consumption of muographic tracking detectors in field applications
复制标题
实现现场应用中微影跟踪探测器的低气体消耗
DOI：
10.1063/5.0053984
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发表时间：
2021
影响因子：
3.2
通讯作者：
D. Varga
中科院分区：
文献类型：
--
作者：
G. Nyitrai;G. Hamar;D. Varga
气体探测器广泛应用于高能物理学，并且是宇宙 μ 子成像（也称为 mu 摄影术）跟踪系统中有吸引力的选择。这种检测器以合理的成本为大尺寸提供高分辨率和高效率，然而，缺点之一是必须防止气态检测介质被外部空气或内部排气污染。标准系统以恒定的气流工作，导致需要定期更换气瓶进行维护，这对于远程现场应用来说可能是一个问题。在本文中，我们讨论了减少室外气体跟踪器气体消耗的实际可能性，特别是日常温度循环引起的气体密度变化限制了输入流量。这种“呼吸”效应可以通过精心设计的缓冲体积来避免，缓冲体积必须防止外部空气污染。面积为 0.9 平方米、总体积为 160 l 的真实 MWPC 跟踪测试系统已在流量为 3 l/天的情况下运行了 36 天，确认缓冲体积（在本例中为 50 m 长、体积为 10 l 的低扩散管）可确保足够的气体质量。控制气体流动动力学的关键效应（包括扩散和气体体积变化）已得到定量研究，从而得出实用的设计方案。
Gaseous detectors are widely used in high energy physics, and are attractive choices in tracking systems for cosmic muon imaging, also called muography. Such detectors offer high resolution and high efficiency at reasonable cost for large sizes, however, one of the drawbacks is that the gaseous detection medium must be prevented from contamination by outside air or internal outgassing. Standard systems work with a constant gas flow, leading to regular maintenance in the form of gas cylinder changes, which can be an issue for remote field applications. In this paper we discuss the practical possibilities to reduce gas consumption of an outdoor gaseous tracker, where particularly the gas density change from daily temperature cycling limits the input flow. Such "breathing" effect can be circumvented by well designed buffer volume, which must prevent external air contamination. A realistic MWPC tracking test system with 0.9 square meter area, total volume of 160 l, has been operated for 36 days with a flow of 3 l/day, confirming that the buffer volume, in this case a 50 m long and 10 l volume low diffusion tube, ensures sufficient gas quality. The key effects governing the gas flow dynamics, including diffusion and gas volume change, has been studied quantitatively, leading to practical design prescriptions.
超高能宇宙拉夫天体物理大面积μ介子跟踪探测器——GRAPES-3实验
DOI：
--
发表时间：
2005
期刊：
Nuclear Instruments and Methods in Physics Research A540
影响因子：
--
作者：
Y.Hayashi;S.Kawakami;S.C.Tonwar et al.
通讯作者：
S.C.Tonwar et al.