Neutron time-of-flight spectrometer for high rate diagnosis of deuterium plasmas

The new concept for the design of a neutron time of flight spectrometer ope rating at high rates of events has been studied based on instrumental model ing and neutron transport calculations. The aim is to find an optimized des ign for an instrument that can measure the 2.5 MeV neutron emission from de uterium plasmas and attain diagnostics capabilities comparable to those as has been demonstrated possible with the 14 MeV magnetic proton recoil spect rometer for deuterium-tritium plasmas at Joint European Torus. Preliminary results are presented and used to project the potential for realizing an ad vanced neutron emission spectrometry diagnosis of plasmas. (C) 2001 America n Institute of Physics.