Application of a single crystal chemical vapor deposition diamond detector for deuteron plasma neutron measurement
Application of a single crystal chemical vapor deposition diamond detector for deuteron plasma neutron measurement
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DOI：
10.1016/j.nima.2014.05.067
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发表时间：
2014-10
影响因子：
1.4
通讯作者：
Xufei Xie;X. Yuan;Xing Zhang;Zhongjing Chen;X. Peng;T. Du;Tao Li;Z. Hu;Z. Cui;
中科院分区：
文献类型：
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作者：
Xufei Xie;X. Yuan;Xing Zhang;Zhongjing Chen;X. Peng;T. Du;Tao Li;Z. Hu;Z. Cui;
对单晶化学气相沉积（scCVD）金刚石探测器进行了表征，并将其用于HL-2A托卡马克装置的中子测量。在scCVD金刚石探测器表面沉积了5 μm的氟化锂（LiF）层，提高了探测器对热中子的灵敏度。用α-源研究了探测器的时间稳定性，在12 h以上的时间内表现良好。在2.50 ~ 16.03 MeV的准单能中子场中进行了中子辐照。scCVD金刚石探测器对14.13 MeV中子的响应函数显示出一个窄的12c (n, α)9Be反应峰，该反应峰与其他结构在能量上隔离了约1 MeV，表明了作为快中子光谱仪的巨大潜力。在HL-2A托卡马克装置上建立了氘等离子体放电的中子测量，该探测器信号与其他相关信号具有较好的一致性。
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 narrow12C (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.