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P: Fachverband Plasmaphysik

P 5: Poster Session 1

P 5.16: Poster

Montag, 9. März 2020, 16:30–18:30, Empore Lichthof

Preparation of Triton Burn-Up Studies in Future Deuterium Plasmas of Wendelstein 7-X — •Jan Paul Koschinsky¹, Christoph Biedermann¹, Sergey A. Bozhenkov¹, Monika Koleva², G. A. Wurden³, Andreas Zimbal⁴, Robert C. Wolf¹, the W7-X Team¹, and the ASDEX Upgrade Team² — ¹Max-Planck-Institut für Plasmaphysik, Wendelsteinstraße 1, D-17491, Greifswald, Germany — ²IPP, Garching — ³LANL, US — ⁴PTB, Braunschweig

Fast ion confinement is crucial for realizing burning fusion plasmas, both in tokamaks and stellarators. 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. Depending on confinement and slowing-down processes, the produced tritons will fuse with the surrounding deuterons. This triton burn-up fusion process gives birth to 14 MeV neutrons. Triton burn-up is studied with SciFi, which can discriminate between 14 MeV and 2.5 MeV neutrons.
The characterization of the SciFi detector, utilizing a mono-energetic neutron source at the German National Metrology Institute, PTB Braunschweig, and triton burn-up studies at the ASDEX Upgrade tokamak are presented. An update of a one-dimensional neutron rate estimation for purely ECRH heated W7-X deuterium plasmas is also given.