Silicon surface barrier detector for fusion neutron spectroscopy
Silicon surface barrier detector for fusion neutron spectroscopy
复制标题
用于聚变中子能谱的硅表面势垒探测器
DOI：
10.1063/1.1139174
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发表时间：
1986
影响因子：
1.6
通讯作者：
L. Samuelson
中科院分区：
文献类型：
--
作者：
T. Elevant;H. Hendel;E. Nieschmidt;L. Samuelson
本征28Si(n,α)25Mg和28Si(n, p)28Al反应在硅表面势垒探测器中用于测量D - T聚变等离子体离子温度和D - T聚变中子通量的有效性进行了研究。对于14兆电子伏特的中子发生器窄能量线源，确定了能量分辨率（~ 1.5%）、检测效率和有用计数率。基于这些结果，在100 ms的时间内，从中子诱导α谱线的全宽度半最大值（FWHM）可以确定2至6 keV的D - T等离子体离子温度，误差估计分别为25%至5%。标称1500 μm厚探测器的最大本征检测效率为~ 6×10−4。
The usefulness of the intrinsic 28Si(n,α)25Mg and 28Si(n, p)28Al reactions in silicon surface barrier detectors for measurements of ion temperatures in D‐T fusion plasmas and of D‐T fusion neutron flux has been investigated. For a 14‐MeV neutron‐generator narrow‐energy‐line source, the energy resolution (∼1.5%), detection efficiency, and useful count rates have been determined. Based on these results, for a 100‐ms time bin, D‐T plasma ion temperatures from 2 to 6 keV can be determined from the full‐width half‐maximum (FWHM) of the neutron‐induced α spectral lines, with the error estimated to be 25% to 5%, respectively. The maximum intrinsic detection efficiency for a nominal 1500‐μm‐thick detector is ∼6×10−4.