Simulation of a modified neutron detector applied in CSNS

MA Zhong-Jian; WANG Qing-Bin; WU Qing-Biao

doi:10.1088/1674-1137/33/1/012

Chinese Physics C> 2009, Vol. 33> Issue(1) : 54-57 DOI: 10.1088/1674-1137/33/1/012

Simulation of a modified neutron detector applied in CSNS

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Abstract：
We simulate the response of a modified Anderson-Braun rem counter in the energy range from thermal energy to about 10 GeV using the FLUKA code. Also, we simulate the lethargy spectrum of CSNS outside the beam dump.
Traditional BF₃ tube is replaced by the ³He tube, a layer of 0.6 cm lead is added outside the boron doped plastic attenuator and a sphere configuration is adopted. The simulation result shows that its response is exactly fit to H*(10) in the neutron energies between 10 keV and approximately 1 GeV, although the monitor slightly underestimates H*(10) in the energy range from thermal energy to about 10 keV. According to the characteristics of the CSNS, this modified counter increases the neutron energy response by 30% compared with the traditional monitors, and it can be applied in other kinds of stray field rich of high energy neutrons.

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MA Zhong-Jian, WANG Qing-Bin and WU Qing-Biao. Simulation of a modified neutron detector applied in CSNS[J]. Chinese Physics C, 2009, 33(1): 54-57. doi: 10.1088/1674-1137/33/1/012

MA Zhong-Jian, WANG Qing-Bin and WU Qing-Biao. Simulation of a modified neutron detector applied in CSNS[J]. Chinese Physics C, 2009, 33(1): 54-57. doi: 10.1088/1674-1137/33/1/012 shu

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Received: 2008-04-09
Revised: 2008-05-19

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沈阳化工大学材料科学与工程学院沈阳 110142

Simulation of a modified neutron detector applied in CSNS

Corresponding author: MA Zhong-Jian,

Received Date: 2008-04-09
Accepted Date: 2008-05-19
Available Online: 2009-01-11

Abstract:

We simulate the response of a modified Anderson-Braun rem counter in the energy range from thermal energy to about 10 GeV using the FLUKA code. Also, we simulate the lethargy spectrum of CSNS outside the beam dump.
Traditional BF₃ tube is replaced by the ³He tube, a layer of 0.6 cm lead is added outside the boron doped plastic attenuator and a sphere configuration is adopted. The simulation result shows that its response is exactly fit to H*(10) in the neutron energies between 10 keV and approximately 1 GeV, although the monitor slightly underestimates H*(10) in the energy range from thermal energy to about 10 keV. According to the characteristics of the CSNS, this modified counter increases the neutron energy response by 30% compared with the traditional monitors, and it can be applied in other kinds of stray field rich of high energy neutrons.