Characterization of Low-Pressure MWPC from 1E3 to 1E5 Pa
Yanfeng Wang, Zhijia Sun, Xiaohu Wang, Han Yi, Wei Jiang, Ruirui Fand,, Liang Zhou, Yongcheng He, Changjun Ning, Yuefeng He, Yingtan Zhao, Kang Sun,, Keqing Gao
TL;DR
This paper investigates the signal characteristics and gas gain of a low-pressure MWPC detector with wire cathodes, across a range of pressures from 1,000 to 100,000 Pa, revealing ion drift effects.
Contribution
It provides experimental measurements of gas gain and signal behavior of low-pressure MWPCs with wire cathodes, expanding understanding of their operation at various pressures.
Findings
Observed second pulse caused by ion drift near cathode wire
Measured gas gain across pressure range from 1E3 to 1E5 Pa
Identified signal characteristics related to ion movement
Abstract
The LPMWPC can be used as the {\Delta}E detector for the low-energy charged particle detection. In order to increase the transmittance, the wires were adopted as the cathode. This work investigated the LPMWPC signal characteristics of this configuration and measured the gas gain with a mixture of 90%Ar and 10% CO2 from 1E3 to 1E5 Pa. From the test, the second pulse after the avalanche signal was observed, which proved to be caused by the ions' drifting near the cathode wire.
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