ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We describe a new technique for determining an inertial-confinement-fusion plasma temperature from a neutron time-of-flight spectrum recorded with a multielement detector array−even when each array element becomes fully saturated. A temperature uncertainty 〈20% is achieved over a yield range (approximately-greater-than)10 000 using a 960-element array. Analysis of a spectrum formed by the first detected neutron (first hit) in each array element is used to determine the full spectrum's temporal width. Temperatures for deuterium filled capsules have been determined from spectra recorded with the 20-m, 960-element LaNSA detector. A temperature of 0.88±0.09 keV was determined for a capsule producing only 1.4×106 neutrons. Temperatures determined for capsules yielding more than 2×109 neutrons are consistent with those determined with a 20-m current-mode time-of-flight detector.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1143537
