Ion temperature analysis of implosions of DT-filled capsules

Fuel ion temperatures have been deduced for a series of implosions of defiled capsules by measuring the thermally broadened neutron time-of-flight signals at 10 and 20 m from the target. Typical temperatures were around 1 keV, and the corresponding thermal broadening was comparable to or less than the time response of the detectors. Under these conditions, error minimization is crucial, and we find that the location of the detector and the analysis technique are important. An optimum location exists, but is very sensitive to the yield of the implosion and to the detector response.