Abstract
Commercially available detectors and related components for fusion diagnostics were irradiated with 14-MeV neutrons from OKTAVIAN or RTNS-II. Spectral response of the detectors to 14-MeV neutrons was measured, and experimental formulas for fusion neutron-induced backgrounds of the detectors are given by fitting their pulse height distributions with a summation of exponential functions. This paper also shows typical neutron irradiation effects on the related optical and electronic components and their hardness levels to mean 14-MeV neutron fluences at which their important performance degrades 10%. These data and formulas are useful for the estimation of lifetimes and background levels of fusion diagnostic systems which may be located in the 14-MeV neutron environment of a fusion reactor.
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