Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments

Ping XU; Yi YU; Haiyang ZHOU

doi:10.1088/2058-6272/acb48a

Plasma Science and Technology > 2023 > 25(7): 075101. > DOI: 10.1088/2058-6272/acb48a

Ping XU, Yi YU, Haiyang ZHOU. Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments[J]. Plasma Science and Technology, 2023, 25(7): 075101. DOI: 10.1088/2058-6272/acb48a

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Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments

1.
School of Physics, Xihua University, Chengdu 610039, People's Republic of China
2.
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, People's Republic of China
3.
Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China, Hefei 230026, People's Republic of China

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Corresponding author:
Yi YU, E-mail: yuyi56@mail.sysu.edu.cn
Received Date: September 16, 2022
Revised Date: January 15, 2023
Accepted Date: January 17, 2023
Available Online: December 05, 2023
Published Date: April 04, 2023

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Abstract

Abstract

A single-crystal diamond detector is fabricated to diagnose 14.1 MeV deuterium–tritium (D-T) fusion neutrons. The size of its diamond film is 4.5 mm × 4.5 mm × 500 μm. This film is sandwiched by a flat, strip-patterned gold electrode. The dark current of this detector is experimentally measured to be lower than 0.1 nA under an electric field of 30 kV cm⁻¹. This diamond detector is used to measure D-T fusion neutrons with a flux of about 7.5 × 10⁵ s^–1 cm^–2. The pronounced peak with a central energy of 8.28 MeV characterizing the ${ }^{12} \mathrm{C}(\mathrm{n}, \alpha){ }^9 \mathrm{Be}$ reaction in the neutron energy spectrum is experimentally diagnosed, and the energy resolution is better than 1.69%, which is the best result reported so far using a diamond detector. A clear peak with a central energy of 6.52 MeV characterizing the ${ }^{12} \mathrm{C}\left(\mathrm{n}, \mathrm{n}^{\prime}\right) 3 \alpha$ reaction is also identified with an energy resolution of better than 7.67%.
- neutron diagnostic,
- deuterium–tritium neutron,
- single-crystal diamond neutron detector

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Acknowledgments

The authors thank Dr M. Yin from the Southwestern Institute of Physics for help with MCNP-4C code simulation. This work was supported by National Natural Science Foundation of China (No. 12075241).

References (29)

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Fabrication of a single-crystal diamond neutron detector and its application in 14.1 MeV neutron detection in deuterium–tritium fusion experiments

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