Author/Authors :
Xie، نويسنده , , Xufei and Yuan، نويسنده , , Xi and Zhang، نويسنده , , Xing and Chen، نويسنده , , Zhongjing and Peng، نويسنده , , Xingyu and Du، نويسنده , , Tengfei and Li، نويسنده , , Tao and Hu، نويسنده , , Zhimeng and Cui، نويسنده , , Zhiqiang and Chen، نويسنده , , Jinxiang and Li، نويسنده , , Xiangqing and Zhang، نويسنده , , Guohui and Fan، نويسنده , , Tieshuan and Yuan، نويسنده , , Guoliang and Yang، نويسنده , , Jinwei and Yang، نويسنده , , Qingwei، نويسنده ,
Abstract :
A single crystal chemical vapor deposition (scCVD) diamond detector has been characterized and employed for the neutron measurement at the HL-2A tokamak device. The scCVD diamond detector has been deposited with 5 μm of lithium fluoride (LiF) layer to enhance the sensitivity to thermal neutrons. Time stability of the detector has been studied with α-source and good performance has been found for more than 12 h. Neutron irradiations have been performed in four quasi-monoenergetic neutron fields in the energy range from 2.50 MeV to 16.03 MeV. The measured response function of the scCVD diamond detector to 14.13 MeV neutrons shows a narrow 12C (n, α)9Be reaction peak which is well isolated from other structures by about 1 MeV in energy, indicating the great potential as a fast neutron spectrometer. Neutron measurement of deuterium plasma discharge was established at the HL-2A tokamak device, and good consistence has been revealed among this detector signal and other related signals.
Keywords :
scCVD diamond detector , LiF layer , Neutron spectrometer , Fusion neutron measurement
