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- Title
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.
- Authors
Ogawa, K.; Isobe, M.; Sangaroon, S.; Takada, E.; Nakada, T.; Murakami, S.; Jo, J.; Zhong, G. Q.; Yipo Zhang; Tamaki, S.; Murata, I.
- Abstract
A middle-sensitivity scintillating fiber detector (hereafter middle Sci-Fi detector) that works at a deuterium-tritium neutron flux of ~105-107 cm-2s-1 was utilized to measure secondary deuterium-tritium neutron emission rates with high temporal resolution at a total neutron emission rate of 1013 to 1015 n/s, where strong magnetohydrodynamic (MHD) instabilities were observed in the large helical device deuterium plasma experiments. The gain and angular characteristics of the middle Sci-Fi detector were evaluated in an accelerator-based deuterium-tritium neutron source in the intense 14 MeV neutron source facility at Osaka University. Observation of 1 MeV triton transport due to MHD instability was performed by a middle Sci-Fi detector whose deuterium-tritium neutron counting rate was approximately 20 times higher than that of the conventional Sci-Fi detector. Fusion-born triton transport due to energetic-particle-driven MHD instability was observed using the middle Sci-Fi detector due to its high detection efficiency and high discrimination ability of deuterium-tritium neutrons from the sea of deuterium-deuterium neutrons.
- Subjects
OSAKA University; NEUTRON counters; NEUTRON measurement; TRITIUM; NEUTRON emission; PLASMA devices; MAGNETOHYDRODYNAMIC instabilities; DEUTERIUM; DEUTERIUM plasma
- Publication
AAPPS Bulletin, 2021, Vol 31, p1
- ISSN
0218-2203
- Publication type
Article
- DOI
10.1007/s43673-021-00023-2