Abstract
Nuclear diagnostic techniques play an ever increasing role in the characterization of final fuel conditions for ICF implosions as target sizes increase. With today’s high neutron yields, many neutron-based measurements can be used to determine final core conditions such as fuel density and temperature, fuel and pusher areal densities, hot spot size and shape, and implosion characteristics such as neutron emission time and burn history. Experiments can be designed to emit neutrons or other nuclear reaction products from which measurements allow the study of processes such as charged particle slowing in plasmas or fuel-pusher mixing. An overview of work in progress at the Lawrence Livermore National Laboratory Nova Laser Fusion Facility will be presented, with particular emphasis on techniques involving the measurement of secondary and tertiary neutron energy spectra. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract No. W-7405-ENG-48.
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