TY - GEN
T1 - Simulation of RF current condensation on ASDEX upgrade
AU - the AUG Team
AU - Fu, L.
AU - Nies, R.
AU - Reiman, A.
AU - Fisch, N.
AU - Maraschek, M.
N1 - Publisher Copyright:
© 2021 47th EPS Conference on Plasma Physics, EPS 2021. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Large, locked islands precede 95% of the disruptions occurring in JET with an ITER-like wall [1]. Electron cyclotron current drive can stabilize large islands and is planned for stabilization of tearing modes on ITER. The theory of current condensation [2] predicts a nonlinear amplification of power deposition due to the temperature sensitivity of ECCD, which improves stabilization efficiency by self-focusing power deposition at island O-points. Alternatively, premature nonlinear damping can occur at the island periphery, “shadowing” island center and reducing stabilization efficiency. The effect can be significant when large ECCD (~20MW for ITER) power is available. We present a numerical code OCCAMI (Of Current Condensation Amid Magnetic Islands) [3] and preliminary simulation results for possible experiments on ASDEX Upgrade (AUG) verifying the theory of current condensation.
AB - Large, locked islands precede 95% of the disruptions occurring in JET with an ITER-like wall [1]. Electron cyclotron current drive can stabilize large islands and is planned for stabilization of tearing modes on ITER. The theory of current condensation [2] predicts a nonlinear amplification of power deposition due to the temperature sensitivity of ECCD, which improves stabilization efficiency by self-focusing power deposition at island O-points. Alternatively, premature nonlinear damping can occur at the island periphery, “shadowing” island center and reducing stabilization efficiency. The effect can be significant when large ECCD (~20MW for ITER) power is available. We present a numerical code OCCAMI (Of Current Condensation Amid Magnetic Islands) [3] and preliminary simulation results for possible experiments on ASDEX Upgrade (AUG) verifying the theory of current condensation.
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M3 - Conference contribution
AN - SCOPUS:85119691341
T3 - 47th EPS Conference on Plasma Physics, EPS 2021
SP - 896
EP - 899
BT - 47th EPS Conference on Plasma Physics, EPS 2021
PB - European Physical Society (EPS)
T2 - 47th EPS Conference on Plasma Physics, EPS 2021
Y2 - 21 June 2021 through 25 June 2021
ER -