SMuK 2021 – scientific programme
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P: Fachverband Plasmaphysik
P 9: Codes and Modelling (Methods)
P 9.1: Talk
Wednesday, September 1, 2021, 16:30–16:45, H5
Determination of 2D Plasma Parameters with Filtered Cameras - An Application to the X-Point Radiator — •Emanuel Huett1,2, Matthias Bernert1, Alexander Bock1, Marco Cavedon1,2, Pierre David1, Tilmann Lunt1, Korbinian Moser1, Takashi Nishizawa1, Ou Pan1, Ulrich Stroth1,2, and The ASDEX Upgrade Team1 — 1Max-Plack-Institut für Plasmaphysik, Garching, Germany — 2Technische Universität München, Munich, Germany
A method for the determination of 2D plasma parameters with filtered cameras has been developed. Major advantages are a high spatial resolution, 2D electron temperature, electron density and neutral density. The camera system at the ASDEX Upgrade Tokamak was upgraded to measure the deuterium balmer alpha, beta, gamma spectral lines and a nitrogen II multiplett simultaneously. Reflections are taken into account and can make a substantial contribution. The method's application is of interest in divertor physics, but also for more exotic studies like plasma production for wall conditioning. The method has been successfully applied to discharges with a well developed X-point radiator, one of the most promising scenarios for power exhaust control in a fusion reactor. First results show that the X-point radiator successfully cools the plasma to a point where recombination dominates. This is supported by simulations. A first verification with the new divertor Thomson scattering and divertor spectroscopy shows a reasonable agreement.