Verification of a fusion neutron diagnostic Bonner sphere spectrometer on measurement of a 241Am-Be neutron source

• Published in: Nuclear science and techniques Vol. 27; no. 6; pp. 125 - 129
• Main Authors: Cao, Jing, Jiang, Chun-Yu, Yang, Qing-Wei, Yin, Ze-Jie
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.12.2016; State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China%Southwestern Institute of Physics, Chengdu 610041, China
• Subjects: Energy; Geant4; Hadrons; Heavy Ions; Nuclear Energy; Nuclear Physics; 中子源; 中子诊断; 光谱仪; 托卡马克实验; 托卡马克装置; 聚变; 计量检定; Tokamak; HL_2A; Bonner sphere spectrometer; Geant4; Am–Be; HL 2A; 241Am-Be
• ISSN: 1001-8042; 2210-3147
• DOI: 10.1007/s41365-016-0126-2

A Bonner sphere spectrometer（BSS） was developed for neutron diagnostic on HL2A Tokamak.It contains eight polyethylene spheres embedded with SP93 He proportional counter.Before setting up on the Tokamak experimental hall,a verification experiment was arranged on a241Am–Be neutron source to test its spectrometry capability.The neutron response functions were calculated by Monte Carlo code Geant4 to simulate the real measurement environments.By least square method,the neutron spectrum was finally unfolded on log domain from0.1 e V to 11 Me V.It has a remarkable consistency to the ISO 8529-1 standard241Am–Be neutron spectrum.This shows that the BSS is effective and reliable for neutron spectrum determination.