High energy particle measurement with a diamond detector on the LHD

Abstract

Confinement of high-energy ions in a fusion plasma is essentially important. Their behaviors can be investigated through the measurement of lost ions and/or neutral particles escaping from the magnetic plasma container. Recently, Krasilmikov et al. have developed Natural Diamond Detectors (NDD) for particle spectrometry. This kind of detector had been extensively used for the 14 MeV neutron spectrum measurement. They also developed NDD’s with very thin graphite contacts especially for the charge exchange atom spectrometry in an energy range of about 35 - 100 keV measurement in experiments on the Large Helical Device, LHD.