Author(s): Huang, GW (Huang, Guangwei); Zhou, CZ (Zhou, Chunzhi); Zhang, YY (Zhang, Yiyun); Chen, Y (Chen, Ye); Wu, K (Wu, Kun); Li, LX (Li, Linxiang); Zhu, HY (Zhu, Hongying); Li, ZY (Li, Zhiyuan); Wang, ZG (Wang, Zungang); Liu, ZQ (Liu, Zhiqiang); Yi, XY (Yi, Xiaoyan); Li, JM (Li, Jinmin)

Source: IEEE TRANSACTIONS ON NUCLEAR SCIENCE Volume: 69 Issue: 1 Pages: 61-67 DOI: 10.1109/TNS.2021.3136388 Published: JAN 2022

Abstract: Single-crystal diamond (SCD) detectors show promise as neutron spectrometers. They have been increasingly used for neutron monitoring of high-flux deuterium plasmas. In this article, a high-performance SCD detector is exposed to D-T neutrons at different angles to measure the energy spectra. The results show that the diamond detector is stable under neutron irradiation fluence of 1.63 x 10(10) n/cm(2) during the 2 h testing. Its detection efficiency for C-12 (n, alpha) Be-9 is (331 +/- 0.11) x 10(-4) counts/n, which is in good agreement with a Monte Carlo simulation predicted by a Geant4 simulation. The deviation in the detection efficiency between the simulation and experimental results is as low as 0.61%. In addition, a response matrix is created and Gaussian broadening has been applied to obtain a good alignment between the measured and simulated results. Finally, a variety of neutron spectrum unfolding methods, namely, the non-negative least-squares algorithm, the Gravel algorithm, the Gold algorithm, and the Lucy-Richardson algorithm, are applied and compared in detail, demonstrating that using a SCD detector, the precise energy distribution of the D-T neutrons from different angles can be obtained by exploiting the spectrum unfolding methods.

Accession Number: WOS:000744534800012

ISSN: 0018-9499

eISSN: 1558-1578

Full Text: https://ieeexplore.ieee.org/document/9654180