Erlangen 2018 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 26: Magnetic Confinement II - Helmholtz Graduate School V
P 26.4: Vortrag
Donnerstag, 8. März 2018, 15:15–15:40, A 0.112
ICRH heating and antenna performance in magnetically perturbed 3D tokamak plasmas — •Guillermo Suarez Lopez1,2, Roman Ochoukov1, Matthias Willensdorfer1, Volodymyr Bobkov1, Mike Dunne1, Helmut Faugel1, Helmut Funfgelder1, Jean-Marie Noterdaeme1,3, Erika Strumberger1, Wolfgang Suttrop1, Hartmut Zohm1,2, ASDEX Upgrade team1, and EUROfusion-MST1 Team1 — 1Max Planck Institute for Plasma physics, Garching b. Munchen, Germany — 2Ludwig Maximillians University, Munich, Germany. — 3University of Ghent, Ghent, Belgium
Ion Cyclotron resonant heating (ICRH) is an efficient process in which an antenna excites the fast magnetosonic acoustic wave in a magnetically confined plasma in order to increase the energy of the plasma ions via wave damping. The fast wave is, however, evanescent in low-density plasmas, such as the one in the edge region of a tokamak, where such an antenna is usually installed. This means that only a fraction of the total power sent to the antenna is coupled to the plasma wave. Analytically, the amount of power that can be coupled is very well understood for simple cases, such as a one-strap antenna radiating to a uniform plasma. More complex problems require the use of numerical computations. In this work, we study the coupling of the fast wave in an intrinsic 3D geometry, namely, a tokamak plasma with applied magnetic perturbations (MP). Both experimental data and numerical MHD simulations are presented. A relation between applied MP phasing, plasma 3D displacement, and ICRH coupling is found.