Time-resolved secondary triton burnup 14 MeV neutron measurement by a new scintillating fiber detector in middle total neutron emission ranges in deuterium large helical device plasma experiments

Abstract A middle-sensitivity scintillating fiber detector (hereafter middle Sci-Fi detector) that works at a deuterium-tritium neutron flux of ~10 5 -10 7 cm −2 s −1 was utilized to measure secondary emission rates with high temporal resolution total rate 10 13 15 n/s, where strong magnetohydrodynamic (MHD) instabilities were observed in the large helical device deuterium plasma experiments. The gain and angular characteristics evaluated an accelerator-based source intense 14 MeV facility Osaka University. Observation 1 triton transport due MHD instability performed by whose counting approximately 20 times higher than conventional detector. Fusion-born energetic-particle-driven using its detection efficiency discrimination ability neutrons from sea deuterium-deuterium neutrons.