Multi-Detector Array for Measuring Tertiary Neutron Anisotropies in DT ICF Targets

Minimizing Background Data with Na-22 and Cu-64 at SUNY Geneseo Event Data •Develop a diagnostic to measure DT neutron anisotropies in a ICF burn at the NIF. •The diagnostic will be composed of eight ultrapure graphite disks used as tertiary neutron detectors strategically placed around the NIF chamber which will become activated during the burn. •Efficiently measure the back-to-back 511 keV gamma rays created by positron decay of the radioactive 11C using eight on Axis pairs of NaI(Tl) detectors. Also to limit the number of accidental coincidences, minimize ambient background gamma ray counts, and maximize geometric counting efficiency. •From this diagnostic determine the yield and distribution of tertiary neutrons resulting from an ICF reaction.