Time-of-flight neutron spectrometer for DT-plasma diagnostics

A novel technique for energy measurements of fusion neutrons from DT-plasmas has been investigated. The method is based on double interaction of neutrons in two scintillators and uses time-of-flight measurement. By using a deuterium based first detector and recording the backscattered neutrons the resolution is found to be 3.5% for 14 MeV neutrons with a flight path equal to 2 m.