Radiation damage of optical components and electronic devices for fusion diagnostics with fusion (14MeV) neutron.

Abstract

In spite of the recent and much progress in the optical components and electronic devices, the radiation-resistant diagnostic devices for nuclear fusion machines are still highly required. The irradiation tests with fusion neutron were carried out by using RTNS-II (Rotating Target Neutron Source-II) at LLNL (Lawrence Livermore National Laboratory) in California, USA. The principal objective in demonstrating the radiation effects with 14MeV neutron on various devices is to determine the hardness level expressed in the maximum fusion (14MeV) neutron fluences at which their principal performance degrades 10 per cent.The optical components and electronic devices used in present work are the optical fibers, photoelectric devices, electronic devices and radiation detectors.The hardness levels for various optical components and electronic devices are given. These data may be used for the estimation of lifetimes of optical components and electronic devices for fusion diagnostics which will be installed in fusion machines.