Experimental validation of a Tokamak neutron spectrometer based on Bonner spheres

CAO Jing; JIANG Chun-Yu; CAO Hong-Rui; YIN Ze-Jie

doi:10.1088/1674-1137/39/8/086001

Chinese Physics C> 2015, Vol. 39> Issue(8) : 086001 DOI: 10.1088/1674-1137/39/8/086001

Experimental validation of a Tokamak neutron spectrometer based on Bonner spheres

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Abstract：
In order to realize real-time fusion neutron spectrum diagnosis for the HL_₂A Tokamak, a Bonner Sphere Spectrometer (BSS) array has been developed, consisting of eight polyethylene spheres (PS) with embedded ³He proportional counters. To validate its spectrometric capability, spectrum measurement of an ²⁴¹Am-Be neutron source was carried out and is described. The Monte Carlo code Geant4 was used to calculate the response functions, taking this interference into consideration. Finally, the neutron spectrum was unfolded in the energy range from 10^-9 MeV to 20 MeV. The unfolded spectrum has remarkable consistency with the ISO 8529-1 standard ²⁴¹Am-Be neutron spectrum which is a preliminary demonstration that this BSS is reliable and practical.

References

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CAO Jing, JIANG Chun-Yu, CAO Hong-Rui and YIN Ze-Jie. Experimental validation of a Tokamak neutron spectrometer based on Bonner spheres[J]. Chinese Physics C, 2015, 39(8): 086001. doi: 10.1088/1674-1137/39/8/086001

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Received: 2014-08-26
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Experimental validation of a Tokamak neutron spectrometer based on Bonner spheres

Corresponding author: CAO Jing,

Corresponding author: YIN Ze-Jie,

Received Date: 2014-08-26

Accepted Date: 1900-01-01

Available Online: 2015-08-15

Abstract: In order to realize real-time fusion neutron spectrum diagnosis for the HL_₂A Tokamak, a Bonner Sphere Spectrometer (BSS) array has been developed, consisting of eight polyethylene spheres (PS) with embedded ³He proportional counters. To validate its spectrometric capability, spectrum measurement of an ²⁴¹Am-Be neutron source was carried out and is described. The Monte Carlo code Geant4 was used to calculate the response functions, taking this interference into consideration. Finally, the neutron spectrum was unfolded in the energy range from 10^-9 MeV to 20 MeV. The unfolded spectrum has remarkable consistency with the ISO 8529-1 standard ²⁴¹Am-Be neutron spectrum which is a preliminary demonstration that this BSS is reliable and practical.

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Experimental validation of a Tokamak neutron spectrometer based on Bonner spheres

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