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

ZHANG Jun-Wei; LU Chen-Gui; DUAN Li-Min; MA Long; HU Rong-Jiang; YANG He-Run; MA Peng; GAN Zai-Guo

doi:10.1088/1674-1137/38/2/026004

Chinese Physics C> 2014, Vol. 38> Issue(2) : 026004 DOI: 10.1088/1674-1137/38/2/026004

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

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Abstract：
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 α ²³⁹Pu 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 efficiency 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.

References

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ZHANG Jun-Wei, LU Chen-Gui, DUAN Li-Min, MA Long, HU Rong-Jiang, YANG He-Run, MA Peng and GAN Zai-Guo. Performance test of the low-pressure thin window multi-wire chamber[J]. Chinese Physics C, 2014, 38(2): 026004. doi: 10.1088/1674-1137/38/2/026004

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Received: 2013-03-14
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: ZHANG Jun-Wei,

Corresponding author: DUAN Li-Min,

Received Date: 2013-03-14
Accepted Date: 1900-01-01
Available Online: 2014-02-05

Abstract: 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 α ²³⁹Pu 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 efficiency 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.