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Development of high-pressure multi-wire proportional chamber neutron detector for the China Spallation Neutron Source multipurpose reflectometer

Wen Zhi-Wen Qi Hui-Rong Zhang Yu-Lian Wang Hai-Yun Liu Ling Wang Yan-Feng Zhang Jian Li Yu-Hong Sun Zhi-Jia

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Development of high-pressure multi-wire proportional chamber neutron detector for the China Spallation Neutron Source multipurpose reflectometer

Wen Zhi-Wen, Qi Hui-Rong, Zhang Yu-Lian, Wang Hai-Yun, Liu Ling, Wang Yan-Feng, Zhang Jian, Li Yu-Hong, Sun Zhi-Jia
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  • As a multipurpose reflectometer device, the two-dimensional (2D) position resolution neutron detector with a 200 mm×200 mm effective area is developed for China Spallation Neutron Source (CSNS) in Dongguang, China. Due to the requirements for the specific parameters of the multipurpose reflectometer, it should be designed to have a more than 50% (@2 Å) detection efficiency, better than 2 mm position resolution and 3 times n/γ resolution ability during the whole operation period of 10 years. The high pressure multi-wire proportional chamber (MWPC) neutron detector filling 3He gas is used as a key detector. Some simulation results and the experimental results show that the optimized thickness of the neutron entrance window should be 9 mm with using the 7075 aluminum alloy, the high pressure chamber should be sealed by the aluminous ring and a gas mixture should be filled with 6 bar 3He+2.5 bar C3H8. The assembled detector can achieve a more than 54% (@2 Å) detection efficiency in the normal operation.With the 100 μm wide collimator slit, the position resolution for X-rays is about 0.235 mm. Therefore, the position resolution for neutron is about 1.4 mm when 2.5 bar propane is used as the stopping gas for proton and triton. In the chamber, the water vapor, the oxygen and the organic impurity gases will reduce the gas gain, cause the detector electrodes to break down and the detector to speed up aging. To solve the outgassing effect of the detector components and keep the stable operation, the recycled device is designed to have the purification function for the working gases. It could purify the working gas at a flow rate of 2 L/min to remove the oxygen, the water vapor and the organic impurity gases. The detector gain increases about 27% with the purification function. Finally, the n/γ resolution and 2D imaging ability of the detector are tested with the 252Cf neutron source in Institute of High Energy Physics, Chinese Academy of Sciences, the peak ratio of neutron to gamma is obtained to be above 5 from the energy spectra and the detecor has good 2D imaging ability. The performance of the high-pressure MWPC neutron detector could meet the requirements for the multipurpose reflectometer, and the detector will be mounted in the CSNS in this year.
      Corresponding author: Qi Hui-Rong, qihr@ihep.ac.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11675197, 11775242).
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    Kampmann R, Marmotti M, Haese-Seiller M, Kudryashov V 2004 Physica B 350 e845

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    Mattauch S, Ioffe A, Lott D, Menelle A, Ott F, Medic Z 2016 J. Phys.: Conf. Ser. 711 012009

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    Avdeev M V, Bodnarchuk V I, Lauter-Pasyuk V V, Lauter H, Aksenov V L, Yaradaikin S P, Ulyanov V A, Trounov V A, Kalinin S I 2010 J. Phys.: Conf. Ser. 251 012060

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    Orban J, Cser L, Rosta L, Torok G, Nagy A 2011 NIMA 632 124

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    Radeka V, Schaknowski N A, Smith G C, Yu B 1998 NIMA 419 642

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    Fried J, Harder J A, Mahler G J, Makowiecki D S, Mead J A, Radeka V, Schaknowski N A, Smith G C, Yu B 2002 NIMA 478 415

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    Doumas A, Smith G C 2012 NIMA 675 8

    [16]

    Desai S S, Desai A M 2006 NIMA 557 607

    [17]

    Wen Z W, Qi H R, Wang Y F, Sun Z J, Zhang Y L, Wang H Y, Zhang J, Ouyang Q, Chen Y B, Li Y H 2017 Acta Phys. Sin. 66 072901 (in Chinese) [温志文, 祁辉荣, 王艳凤, 孙志嘉, 张余炼, 王海云, 张建, 欧阳群, 陈元柏, 李玉红 2017 物理学报 66 072901]

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    Abuhoza A, Schmidt H R, Biswas S, Frankenfeld U, Hehner J, Schmidt C J 2013 NIMA 718 400

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    Bouclier R, Capeans M, Garabatos C, Sauli F, Silander F 1994 NIMA 350 464

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    Niebuhr C 2006 NIMA 566 118

    [21]

    Kadyk J A 1991 NIMA 300 436

  • [1]

    Zhang L Y, Jing H T, Tang J Y, Li Q, Ruan X C, Ren J, Ning C J, Yu Y J, Tan Z X, Wang P C, He Y C, Wang X Q 2018 Appl Radiat Isotopes 132 212

    [2]

    Chen J, Kang L, Lu H L, Luo P, Wang F W, He L H 2017 Physica B (accepted)

    [3]

    Shen F, Liang T R, Yin W, Yu Q Z, Zuo T S, Yao Z E, Zhu T, Liang T J 2014 Acta Phys. Sin. 63 152801 (in Chinese) [沈飞, 梁泰然, 殷雯, 于全芝, 左太森, 姚泽恩, 朱涛, 梁天骄 2014 物理学报 63 152801]

    [4]

    Yu Q Z, Yin W, Liang T J 2011 Acta Phys. Sin. 60 052501 (in Chinese) [于全芝, 殷雯, 梁天骄 2011 物理学报 60 052501]

    [5]

    Huang C Q, Chen B, Li X X, Syromyatnikov V G, Pleshanov N K 2008 Acta Phys. Sin. 57 364 (in Chinese) [黄朝强, 陈波, 李新喜, Syromyatnikov V G, Pleshanov N K 2008 物理学报 57 364]

    [6]

    Li T F, Chen D F, Wang H L, Sun K, Liu Y T 2009 Acta Phys. Sin. 58 7993 (in Chinese) [李天富, 陈东风, 王洪立, 孙凯, 刘蕴韬 2009 物理学报 58 7993]

    [7]

    Kampmann R, Marmotti M, Haese-Seiller M, Kudryashov V 2004 Physica B 350 e845

    [8]

    Mattauch S, Ioffe A, Lott D, Menelle A, Ott F, Medic Z 2016 J. Phys.: Conf. Ser. 711 012009

    [9]

    Avdeev M V, Bodnarchuk V I, Lauter-Pasyuk V V, Lauter H, Aksenov V L, Yaradaikin S P, Ulyanov V A, Trounov V A, Kalinin S I 2010 J. Phys.: Conf. Ser. 251 012060

    [10]

    Orban J, Cser L, Rosta L, Torok G, Nagy A 2011 NIMA 632 124

    [11]

    Eijk C W 2002 NIMA 477 383

    [12]

    BoieJ R A, Fischer, Inagaki Y, Merritt F C, Okuno H, Radeka V 1982 NIM 200 533

    [13]

    Radeka V, Schaknowski N A, Smith G C, Yu B 1998 NIMA 419 642

    [14]

    Fried J, Harder J A, Mahler G J, Makowiecki D S, Mead J A, Radeka V, Schaknowski N A, Smith G C, Yu B 2002 NIMA 478 415

    [15]

    Doumas A, Smith G C 2012 NIMA 675 8

    [16]

    Desai S S, Desai A M 2006 NIMA 557 607

    [17]

    Wen Z W, Qi H R, Wang Y F, Sun Z J, Zhang Y L, Wang H Y, Zhang J, Ouyang Q, Chen Y B, Li Y H 2017 Acta Phys. Sin. 66 072901 (in Chinese) [温志文, 祁辉荣, 王艳凤, 孙志嘉, 张余炼, 王海云, 张建, 欧阳群, 陈元柏, 李玉红 2017 物理学报 66 072901]

    [18]

    Abuhoza A, Schmidt H R, Biswas S, Frankenfeld U, Hehner J, Schmidt C J 2013 NIMA 718 400

    [19]

    Bouclier R, Capeans M, Garabatos C, Sauli F, Silander F 1994 NIMA 350 464

    [20]

    Niebuhr C 2006 NIMA 566 118

    [21]

    Kadyk J A 1991 NIMA 300 436

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Publishing process
  • Received Date:  08 December 2017
  • Accepted Date:  19 January 2018
  • Published Online:  05 April 2018

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