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Saturation of Fishbone Instability by Self-Generated Zonal Flows in Tokamak Plasmas.
Brochard, G; Liu, C; Wei, X; Heidbrink, W; Lin, Z; Gorelenkov, N; Chrystal, C; Du, X; Bao, J; Polevoi, A R; Schneider, M; Kim, S H; Pinches, S D; Liu, P; Nicolau, J H; Lütjens, H.
Affiliation
  • Brochard G; ITER organisation, Route de Vinon-sur-Verdon, CS 90 046 13067 St., Paul Lez Durance, France.
  • Liu C; Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
  • Wei X; Princeton Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543,USA.
  • Heidbrink W; Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
  • Lin Z; Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
  • Gorelenkov N; Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
  • Chrystal C; Princeton Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543,USA.
  • Du X; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
  • Bao J; General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA.
  • Polevoi AR; Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
  • Schneider M; ITER organisation, Route de Vinon-sur-Verdon, CS 90 046 13067 St., Paul Lez Durance, France.
  • Kim SH; ITER organisation, Route de Vinon-sur-Verdon, CS 90 046 13067 St., Paul Lez Durance, France.
  • Pinches SD; ITER organisation, Route de Vinon-sur-Verdon, CS 90 046 13067 St., Paul Lez Durance, France.
  • Liu P; ITER organisation, Route de Vinon-sur-Verdon, CS 90 046 13067 St., Paul Lez Durance, France.
  • Nicolau JH; Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
  • Lütjens H; Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
Phys Rev Lett ; 132(7): 075101, 2024 Feb 16.
Article in En | MEDLINE | ID: mdl-38427884
ABSTRACT
Gyrokinetic simulations of the fishbone instability in DIII-D tokamak plasmas find that self-generated zonal flows can dominate the nonlinear saturation by preventing coherent structures from persisting or drifting in the energetic particle phase space when the mode frequency down-chirps. Results from the simulation with zonal flows agree quantitatively, for the first time, with experimental measurements of the fishbone saturation amplitude and energetic particle transport. Moreover, the fishbone-induced zonal flows are likely responsible for the formation of an internal transport barrier that was observed after fishbone bursts in this DIII-D experiment. Finally, gyrokinetic simulations of a related ITER baseline scenario show that the fishbone induces insignificant energetic particle redistribution and may enable high performance scenarios in ITER burning plasma experiments.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2024 Document type: Article
Fulltext
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2024 Document type: Article