Abstract We present a technology for diagnosing the D－T fusion process by detecting capture $\gamma$-rays. This technology provides an alternative route to diagnosing the D－T reaction process when a great deal of heavy Z materials surrounds the D－T region. A very important aspect of this paper is to focus on the methods of shielding low-energy $\gamma$-rays whose radiation intensity is 106 times higher than that of the capture $\gamma$-rays. Another aspect is about how to distinguish signal from noise. The result of a 50/1 signal-to-noise ratio indicates that the designed double-magnetic spectrograph is very successful for diagnosing the D－T fusion reaction process.
Received: 03 December 2001
Revised: 16 July 2002
Accepted manuscript online:
(X- and γ-ray sources, mirrors, gratings, and detectors)
Cite this article:
Xu Rong-Kun (徐荣昆), Tang Zheng-Yuan (唐正元), He Xi-Jun (何锡钧) A method of detecting capture $\gamma$-rays in a strong pulsed radiation field 2002 Chinese Physics 11 1145
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