Performance test of the low-pressure thin window multi-wire chamber

A flow gas low-pressure multi-wire proportional chamber（LPMWPC） with an active area of 180 mm× 80 mm has been developed for the flying time test of the recoil nuclei on super heavy nuclear experiments. The LPMWPC detector can be operated in single as well as double step operational modes. In the cas...

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Published inChinese physics C Vol. 38; no. 2; pp. 57 - 60
Main Author 张俊伟 鲁辰桂 段利敏 马龙 胡荣江 杨贺润 马朋 甘再国
Format Journal Article
LanguageEnglish
Published 01.02.2014
Subjects
Amplification
Chambers
Electronics
Flight
Flying
Leakage
Noise
Recoil
低压
多丝正比室
性能测试
操作模式
时间分辨率
气体泄漏率
窗口
飞行时间
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ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/38/2/026004

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Summary:A flow gas low-pressure multi-wire proportional chamber（LPMWPC） with an active area of 180 mm× 80 mm has been developed for the flying time test of the recoil nuclei on super heavy nuclear experiments. The LPMWPC detector can be operated in single as well as double step operational modes. In the case of double step operational mode with a high gas amplification factor, signals from α-particles reside well above the electronic noise. The gas leakage rate and time resolution obtained from the α239Pu source are shown and discussed at the condition of 3 mbar Isobutane gas. It was shown that the time resolution was better than 2.9 ns at the best work condition, and the detecting efciency was larger than 98% at the low energy α particles. So the LPMWPC is fit to measure the flying time in the super heavy nuclear fragments experiment.
Bibliography:ZHANG Jun-Wei;LU Chen-Gui;DUAN Li-Min;MA Long;HU Rong-Jiang;YANG He-Run;MA Peng;GAN Zai-Guo（ 1 University of Chinese Academy of Sciences, Beijing 100049, China 2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China）
A flow gas low-pressure multi-wire proportional chamber（LPMWPC） with an active area of 180 mm× 80 mm has been developed for the flying time test of the recoil nuclei on super heavy nuclear experiments. The LPMWPC detector can be operated in single as well as double step operational modes. In the case of double step operational mode with a high gas amplification factor, signals from α-particles reside well above the electronic noise. The gas leakage rate and time resolution obtained from the α239Pu source are shown and discussed at the condition of 3 mbar Isobutane gas. It was shown that the time resolution was better than 2.9 ns at the best work condition, and the detecting efciency was larger than 98% at the low energy α particles. So the LPMWPC is fit to measure the flying time in the super heavy nuclear fragments experiment.
11-5641/O4
LPMWPC; gas leakage rate; time resolution; detecting efciency
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/38/2/026004