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(EXP4/04) High Power ECCD Experiments at W7-AS

H. Maassberg¹⁾, J. Geiger¹⁾, H. Laqua¹⁾, N. B. Marushchenko¹⁾, M. Rome²⁾, C. Wendland¹⁾, W7-AS Team^1)
 
1) Max-Planck-Institute für Plasmaphysik, EURATOM-Association, Garching, Germany
²⁾ Dipartimento di Fisica, Universitá degli Studi, Milano, Italy

Abstract.  At the W7-AS stellarator, high power electron cyclotron current drive (ECCD) experiments are analyzed. In these net-current-free discharges, the ECCD as well as the bootstrap current are feedback controlled by an inductive current. Based on measured profiles, the neoclassical predictions for the bootstrap and the inductive current densities as well as the ECCD from the linear adjoint approach with trapped particles included are calculated, and the current balance is checked. Launch-angle scans at fixed density as well as density scans at fixed launch-angle are described.

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