Bochum 2015 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 6: Poster Session - Diagnostics

P 6.3: Poster

Montag, 2. März 2015, 16:30–18:30, Foyer Audimax

Improvement of the Divertor Bolometer Diagnostic in the ASDEX Upgrade Tokamak — •Till Sehmer, Hans Meister, Matthias Bernert, Jürgen Koll, Felix Reimold, Marco Wischmeier, Ursel Fantz, and ASDEX Upgrade Team — Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, 85748 Garching

For future fusion devices such as ITER, the radiation balance in the divertor region will have a significant impact on the power exhaust balance. Therefore, scenarios with strongly localized radiation, like radiation in the high field side high density (HFSHD) region, X-Point radiation or radiation in the divertor legs during detachment, will be investigated in the next ASDEX Upgrade (AUG) operation campaign 2015. To obtain accurately the absolute divertor radiation out of these measurements, the AUG foil bolometer diagnostic system in the divertor region has been enhanced; two new cameras have been designed and manufactured. One will be mounted below the roof baffle and contains 28 lines of sight (LOS), which will observe the mentioned regions of particular physical interest. The second camera consists of 4 LOS and will be mounted at the high field side above the inner divertor nose. It will observe radiation arising from the X-Point region and from the outer divertor. The data will be analysed with a tomographic reconstruction algorithm to localize and quantify the divertor radiation.