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LU Liming, ZHOU Xiaojuan, ZHOU Jianrong, JIANG Xingfen, ZHU Lin, HE Cong, TAN Yingying, YANG Guian, XIA Yuanguang, XIE Yuguang, ZHENG Bo, WANG Xiaodong, CHEN Yuanbai, SUN Zhijia. Performance Study of nTHGEM Detector for Thermal Neutron[J]. Nuclear Physics Review, 2018, 35(2): 172-178. doi: 10.11804/NuclPhysRev.35.02.172
Citation: LU Liming, ZHOU Xiaojuan, ZHOU Jianrong, JIANG Xingfen, ZHU Lin, HE Cong, TAN Yingying, YANG Guian, XIA Yuanguang, XIE Yuguang, ZHENG Bo, WANG Xiaodong, CHEN Yuanbai, SUN Zhijia. Performance Study of nTHGEM Detector for Thermal Neutron[J]. Nuclear Physics Review, 2018, 35(2): 172-178. doi: 10.11804/NuclPhysRev.35.02.172

Performance Study of nTHGEM Detector for Thermal Neutron

doi: 10.11804/NuclPhysRev.35.02.172
Funds:  National Key Research and Development Program (2017YFA0403702); National Natural Science Foundation of China (11635012,11775243); Post Doctoral Innovative Talent Support Program (1IBX20170024545); Natural Science Foundation of Guangdong Province, China (2017A030313027); Scientific Instrument Developing Project of Chinese Academy of Sciences (YZ201512)
  • Received Date: 2018-01-01
  • Rev Recd Date: 2018-03-05
  • Publish Date: 2018-06-20
  • With the development of pulsed intense neutron source, the high-performance neutron detector poses more challenges. The severe shortage of 3He gas resources and the urgent need of neutron detector with high counting rate have begun to restrict the neutron source application technology development. In response to the particularity of neutrons, the Institute of High Energy Physics of CAS developed a nTHGEM(neutron Thick Gaseous Electron Multiplier)of ceramic substrate for neutron detection. The neutron detector based on nTHGEM is one of the most important directions for the development of alternative 3He detection technology in the world at present because of its high counting rate, high position and time resolution, large gain, simple fabrication process and large area production. In order to study the properties of nTHGEM detector in detail, this paper studied the relationship between nTHGEM detector's gain, counting rate stability, energy resolution and other key parameters and nTHGEM film voltage, collection field strength and drift field strength using 55Fe radioactive source, Optimized the working parameters of nTHGEM detector in different working gases, which laid the foundation for further optimization of nTHGEM detector design and process. The experimental results show that the single-layer nTHGEM detector has a gain of 103 in a Ar(90%)+CO2(10%) mixed gas with good counting rate stability. In addition, a neutron beam experiment was performed on the China Advanced Research Reactor at the China Institute of Atomic Energy, and the position resolution of the detector was (3.01±0.03) mm (FWHM) measured by slits. Its performance is close to the high pressure 3He MWPC neutron detector level.
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Performance Study of nTHGEM Detector for Thermal Neutron

doi: 10.11804/NuclPhysRev.35.02.172
Funds:  National Key Research and Development Program (2017YFA0403702); National Natural Science Foundation of China (11635012,11775243); Post Doctoral Innovative Talent Support Program (1IBX20170024545); Natural Science Foundation of Guangdong Province, China (2017A030313027); Scientific Instrument Developing Project of Chinese Academy of Sciences (YZ201512)

Abstract: With the development of pulsed intense neutron source, the high-performance neutron detector poses more challenges. The severe shortage of 3He gas resources and the urgent need of neutron detector with high counting rate have begun to restrict the neutron source application technology development. In response to the particularity of neutrons, the Institute of High Energy Physics of CAS developed a nTHGEM(neutron Thick Gaseous Electron Multiplier)of ceramic substrate for neutron detection. The neutron detector based on nTHGEM is one of the most important directions for the development of alternative 3He detection technology in the world at present because of its high counting rate, high position and time resolution, large gain, simple fabrication process and large area production. In order to study the properties of nTHGEM detector in detail, this paper studied the relationship between nTHGEM detector's gain, counting rate stability, energy resolution and other key parameters and nTHGEM film voltage, collection field strength and drift field strength using 55Fe radioactive source, Optimized the working parameters of nTHGEM detector in different working gases, which laid the foundation for further optimization of nTHGEM detector design and process. The experimental results show that the single-layer nTHGEM detector has a gain of 103 in a Ar(90%)+CO2(10%) mixed gas with good counting rate stability. In addition, a neutron beam experiment was performed on the China Advanced Research Reactor at the China Institute of Atomic Energy, and the position resolution of the detector was (3.01±0.03) mm (FWHM) measured by slits. Its performance is close to the high pressure 3He MWPC neutron detector level.

LU Liming, ZHOU Xiaojuan, ZHOU Jianrong, JIANG Xingfen, ZHU Lin, HE Cong, TAN Yingying, YANG Guian, XIA Yuanguang, XIE Yuguang, ZHENG Bo, WANG Xiaodong, CHEN Yuanbai, SUN Zhijia. Performance Study of nTHGEM Detector for Thermal Neutron[J]. Nuclear Physics Review, 2018, 35(2): 172-178. doi: 10.11804/NuclPhysRev.35.02.172
Citation: LU Liming, ZHOU Xiaojuan, ZHOU Jianrong, JIANG Xingfen, ZHU Lin, HE Cong, TAN Yingying, YANG Guian, XIA Yuanguang, XIE Yuguang, ZHENG Bo, WANG Xiaodong, CHEN Yuanbai, SUN Zhijia. Performance Study of nTHGEM Detector for Thermal Neutron[J]. Nuclear Physics Review, 2018, 35(2): 172-178. doi: 10.11804/NuclPhysRev.35.02.172
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