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P: Fachverband Plasmaphysik
P 15: Helmholtz Graduate School II
P 15.9: Poster
Dienstag, 14. März 2017, 16:30–18:30, HS Foyer
Development of a spectroscopic system to investigate fastion populations in the plasma periphery of ASDEX Upgrade — •Anton Jansen van Vuuren1,2, Benedikt Geiger1, Asger Jacobsen1, and The ASDEX Upgrade Team1 — 1Max- Planck-Institut für Plasmaphysik, Garching, Germany — 2Ludwig-Maximilianis-Universität München, Munich, Germany
Detailed knowledge of fast-ions in fusion plasmas is needed since these supra-thermal particles are responsible for plasma heating, current drive, and at the plasma edge for possible damages to plasma facing components. One tool to investigate fast-ion populations is the fast-ion D-alpha (FIDA) diagnostic. While this spectroscopic technique has been frequently used to investigate the core plasma specially at ASDEX Upgrade, it has not been regularly used to measure fast ions at the plasma edge. This region is of interest since the effects of magnetic error fields, the toroidal field ripple as well as MHD instabilities strongly influence the fast ion confinement at the edge. A newly designed and built spectrometer installed to observe edge intersecting lines of sight during the 2017 campaign at ASDEX Upgrade will be presented along with an assessment of the initial results. The assessment will include a comparison between measured spectra and FIDASIM modeled spectra.