SMuK 2021 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 13: Magnetic Confinement IV & Helmholtz Graduate School IV
P 13.4: Vortrag
Donnerstag, 2. September 2021, 15:20–15:45, H4
2.5 MeV and 14 MeV neutron rate measurements on ASDEX Upgrade and predictions for Wendelstein 7-X — •Jan Paul Koschinsky1, Christoph Biedermann1, Sergey A. Bozhenkov1, Joona Kontula2, Simppa Äkäslompolo1,2, Monika Koleva3, Giovanni Tardini3, C. F. B. Zimmermann3, Ralf Nolte4, Elisa Pirovano4, Andreas Zimbal4, G. A. Wurden5, Robert C. Wolf1, the W7-X Team1, and the ASDEX Upgrade Team3 — 1Max-Planck-Institut für Plasmaphysik, Wendelsteinstraße 1, D-17491, Greifswald, Germany — 2Aalto University, Espoo, Finland — 3IPP, Garching — 4PTB, Braunschweig — 5LANL, US
Fast-ion confinement is crucial for realizing burning fusion plasmas, both in tokamaks and stellarators, as fast fusion-born alpha particles are meant to provide the self-heating of the plasma. Therefore, the possible application of a scintillating fiber neutron detector, SciFi, for studying fast ions in future deuterium plasmas of the Wendelstein 7-X stellarator, is investigated here.
In deuterium plasmas, 2.5 MeV neutrons and 1 MeV tritons are generated via two equally probable fusion channels, respectively. Depending on confinement and slowing-down processes, produced tritons will fuse with surrounding deuterons and give birth to 14 MeV neutrons. A time-resolved study of this triton burn-up process is attainable with SciFi, which can discriminate between 14 MeV and 2.5 MeV neutrons.
Triton burn-up studies with SciFi on the ASDEX Upgrade tokamak are presented. Moreover, predictions of neutron rates in W7-X and the resulting performance of SciFi are discussed.