Simulation of the response functions of an extended rangeneutron multisphere spectrometer using FLUKA

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WANG Pan-Feng, DING Ya-Dong, WANG Qing-Bin, MA Zhong-Jian, GUO Si-Ming and LI Guan-Jia. Simulation of the response functions of an extended rangeneutron multisphere spectrometer using FLUKA[J]. Chinese Physics C, 2015, 39(7): 076001. doi: 10.1088/1674-1137/39/7/076001
WANG Pan-Feng, DING Ya-Dong, WANG Qing-Bin, MA Zhong-Jian, GUO Si-Ming and LI Guan-Jia. Simulation of the response functions of an extended rangeneutron multisphere spectrometer using FLUKA[J]. Chinese Physics C, 2015, 39(7): 076001.  doi: 10.1088/1674-1137/39/7/076001 shu
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Received: 2014-09-28
Revised: 2014-11-06
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Simulation of the response functions of an extended rangeneutron multisphere spectrometer using FLUKA

Abstract: In this paper, the distribution of radiation field in the CSNS spectrometer hall at Dongguan, China, was simulated by the FLUKA program. The results show that the radiation field of the high energy proton accelerator is dominated by neutron radiation, with a broad range of neutron energies, spanning about eleven orders of magnitude. Simulation and calculation of the response functions of four Bonner spheres with a simplified model is done with FLUKA and MCNPX codes respectively, proving the feasibility of the FLUKA program for this application and the correctness of the calculation method. Using the actual model, we simulate and calculate the energy response functions of Bonner sphere detectors with polyethylene layers of different diameters, including detectors with lead layers, using the FLUKA code. Based on the simulation results, we select eleven detectors as the basic structure for an Extended Range Neutron Multisphere Spectrometer (ERNMS).

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