NUCLEAR TECHNIQUES, Volume. 47, Issue 9, 090402(2024)
Research on fusion neutron energy spectrum measurement using a Bonner sphere spectrometer based on a 4H-SiC detector
Figures & Tables(12)
Fig. 1. Bonner sphere spectrometer (a) and diagram of inner structure of 4H-SiC detector (b)
Fig. 2. Response function of the Bonner sphere spectrometer based on 4H-SiC detector
Fig. 3. Diagram of electronics of the Bonner sphere spectrometer based on 4H-SiC detector
Fig. 4. Pulse response signal (a) and pulse amplitude distribution spectrum (b) of 4H-SiC detector
Fig. 5. Pulse amplitude distribution spectrum of 4H-SiC detector in a Bonner sphere of 10.16 cm at #127620 shot
Fig. 6. On-site photo of the Bonner sphere spectrometer in the EAST hall (a) and the diagram of BSS position in the hall and the positions of ZZ3 and ZZ4 in the EAST hall (b)
Fig. 7. Normalized counts of Bonner spheres of different sizes by ZZ3 monitor
Fig. 8. Simulated neutron energy spectrum at the Bonner sphere measurement position
Fig. 9. Comparison between simulated and experimental energy spectra at the measurement position
Table 1. Main parameters of the Bonner sphere
View tableView in ArticleTable 1. Main parameters of the Bonner sphere
材料
Elements
质量比Mass ratio 密度
Density / g
cm-3 氟化锂 6LiF Li∶F=1∶3 2.635 碳化硅 SiC C∶Si=3∶7 3.21 铜 Cu 1 8.96 镍 Ni 1 8.902 聚乙烯 Polyethylene C∶H=1∶2 0.94
Table 2. Comparison between simulated and experimental neutron fluences
View tableView in ArticleTable 2. Comparison between simulated and experimental neutron fluences
中子能谱
Neutron spectrum
能量区间
Energy bins
注量份额
Share of fluence / %
归一化聚变中子源项下的中子注量
Fluence per source neutron / cm2
模拟能谱
Simulated spectrum
0.4 eV以下Below 0.4 eV 21.1 1.40×10-7 0.4 eV~0.01 MeV 34.7 0.01~2.5 MeV 37.0 2.5 MeV 7.2 实验能谱
Experimental spectrum
0.4 eV以下Below 0.4 eV 11.7 1.38×10-7 0.4 eV~0.01 MeV 36.8 0.01~2.5 MeV 42.1 2.5 MeV 9.4
Table 3. Comparison between simulated and experimental ambient dose equivalents
View tableView in ArticleTable 3. Comparison between simulated and experimental ambient dose equivalents
中子能谱
Neutron spectrum
能量区间
Energy bins
H*(10)份额
Share of H*(10) / %
归一化聚变中子源项下的H*(10)
H*(10) per source neutron /
模拟能谱
Simulated spectrum
0.4 eV以下Below 0.4 eV 1.3 2.15×10-11 0.4 eV~0.01 MeV 1.6 0.01~2.5 MeV 77.4 2.5 MeV 19.7 实验能谱
Experimental spectrum
0.4 eV以下Below 0.4 eV 0.1 2.27×10-11 0.4 eV~0.01 MeV 1.4 0.01~2.5 MeV 76.3 2.5 MeV 22.2
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Mingqiang ZHANG, Guoqiang ZHONG, Juan HUANG, Jiafeng CHANG, Qin DU, Chuankai CHEN, Yang LU, Le CHEN. Research on fusion neutron energy spectrum measurement using a Bonner sphere spectrometer based on a 4H-SiC detector[J]. NUCLEAR TECHNIQUES, 2024, 47(9): 090402
Paper Information
Category: NUCLEAR ELECTRONICS AND INSTRUMENTATION
Received: Jan. 16, 2024
Accepted: --
Published Online: Nov. 13, 2024
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