Screening of resonant magnetic perturbations by flows in tokamaks

0376782 - ÚFP 2013 RIV AT eng J - Článek v odborném periodiku
Bécoulet, M. - Orain, F. - Maget, P. - Mellet, N. - Garbet, X. - Nardon, E. - Huysmans, G.T.A. - Casper, T. - Loarte, A. - Cahyna, Pavel - Smolyakov, A. - Waelbroeck, F.L. - Schaffer, M. - Evans, T. - Liang, Y. - Schmitz, O. - Beurskens, M. - Rozhansky, V. - Kaveeva, E.
Screening of resonant magnetic perturbations by flows in tokamaks.
Nuclear Fusion. Roč. 52, č. 5 (2012), s. 054003. ISSN 0029-5515. E-ISSN 1741-4326.
[Workshop on Stochasticity in Fusion Plasmas/5./. Jülich, 11.04.2011-14.04.2011]
Grant CEP: GA ČR GAP205/11/2341
Výzkumný záměr: CEZ:AV0Z20430508
Klíčová slova: tokamak * resonant magnetic perturbation * magnetohydrodynamics * ELM control
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 2.734, rok: 2012
http://iopscience.iop.org/0029-5515/52/5/054003/pdf/0029-5515_52_5_054003.pdf

The non-linear reduced four-field RMHD model in cylindrical geometry was extended to include plasma rotation, neoclassical poloidal viscosity and two fluid diamagnetic effects. Interaction of the static resonant magnetic perturbations (RMPs) with the rotating plasmas in tokamaks was studied. The self-consistent evolution of equilibrium electric field due to RMP penetration is taken into account in the model. Generally, the screening effect increases for lower resistivity, stronger rotation and smaller RMP amplitude. Strong screening of central islands was observed limiting RMP penetration to the narrow region near the separatrix. However, at certain plasma parameters and due to the non-linear evolution of the radial electric field produced by RMPs, the ExB rotation can be compensated by electron diamagnetic rotation locally. In this case, RMPs can penetrate and form magnetic islands. Typical plasma parameters and RMPs spectra on DIII-D, JET and ITER were used in modelling examples.
Trvalý link: http://hdl.handle.net/11104/0209098