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TIAN Lichao, ZHAO Zijia, CHEN Zhong, JIANG Jing, LÜ Zhongliang, MA Yanyun. Simulation of a Novel Neutron Detector Based on Multi-layer MWPC with 10B4C Convertor[J]. Nuclear Physics Review, 2019, 36(1): 71-77. doi: 10.11804/NuclPhysRev.36.01.071
Citation: TIAN Lichao, ZHAO Zijia, CHEN Zhong, JIANG Jing, LÜ Zhongliang, MA Yanyun. Simulation of a Novel Neutron Detector Based on Multi-layer MWPC with 10B4C Convertor[J]. Nuclear Physics Review, 2019, 36(1): 71-77. doi: 10.11804/NuclPhysRev.36.01.071

Simulation of a Novel Neutron Detector Based on Multi-layer MWPC with 10B4C Convertor

doi: 10.11804/NuclPhysRev.36.01.071
Funds:  National Natural Science Foundation of China (11505287); Fun of Robot Technology Used for Special Environment Key Laboratory of Sichuan Province (17kftk01); Opening Foundation of Key Laboratory of Neutronics and Radiation Safety of CAS (NEUTRON201707)
  • Received Date: 2018-06-07
  • Rev Recd Date: 2018-07-22
  • Publish Date: 2019-03-20
  • As the development of high flux neutron sources and neutron scattering spectrometers in China, more and more neutron detectors with high detection efficiency, high position resolution, high time resolution and low gamma sensitivity are need ungently. 3He based neutron detector is one of the best options. Recently, because of the 3He gas shortage and its expensive price, we must find a new replacement of 3He. A two-dimensional position sensitive neutron detector based on multi-layer Multi Wires Proportional Chambers (mMWPC) with 10B4C converter was proposed in this paper. The neutron detection efficiency, position resolution and γ compression were simulated with Geant4 and Garfield++. The results show that with 40 layers of neutron convertor, high themal neutron (E=0.025 eV) detection of~54%, best position resolution of 2.6 mm (FWHM) and high n/γ rejection ratio of~107 with the threshold of 200 keV can be achieved, which can meet the requirements of most spectrometers. This simulation results lay a good foundation for the next step of detector construction and test.
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Simulation of a Novel Neutron Detector Based on Multi-layer MWPC with 10B4C Convertor

doi: 10.11804/NuclPhysRev.36.01.071
Funds:  National Natural Science Foundation of China (11505287); Fun of Robot Technology Used for Special Environment Key Laboratory of Sichuan Province (17kftk01); Opening Foundation of Key Laboratory of Neutronics and Radiation Safety of CAS (NEUTRON201707)

Abstract: As the development of high flux neutron sources and neutron scattering spectrometers in China, more and more neutron detectors with high detection efficiency, high position resolution, high time resolution and low gamma sensitivity are need ungently. 3He based neutron detector is one of the best options. Recently, because of the 3He gas shortage and its expensive price, we must find a new replacement of 3He. A two-dimensional position sensitive neutron detector based on multi-layer Multi Wires Proportional Chambers (mMWPC) with 10B4C converter was proposed in this paper. The neutron detection efficiency, position resolution and γ compression were simulated with Geant4 and Garfield++. The results show that with 40 layers of neutron convertor, high themal neutron (E=0.025 eV) detection of~54%, best position resolution of 2.6 mm (FWHM) and high n/γ rejection ratio of~107 with the threshold of 200 keV can be achieved, which can meet the requirements of most spectrometers. This simulation results lay a good foundation for the next step of detector construction and test.

TIAN Lichao, ZHAO Zijia, CHEN Zhong, JIANG Jing, LÜ Zhongliang, MA Yanyun. Simulation of a Novel Neutron Detector Based on Multi-layer MWPC with 10B4C Convertor[J]. Nuclear Physics Review, 2019, 36(1): 71-77. doi: 10.11804/NuclPhysRev.36.01.071
Citation: TIAN Lichao, ZHAO Zijia, CHEN Zhong, JIANG Jing, LÜ Zhongliang, MA Yanyun. Simulation of a Novel Neutron Detector Based on Multi-layer MWPC with 10B4C Convertor[J]. Nuclear Physics Review, 2019, 36(1): 71-77. doi: 10.11804/NuclPhysRev.36.01.071
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