Thermal ion kinetic effects and Landau damping in fishbone modes

Liu, Chang; Jardin, Stephen C.; Bao, Jian; Gorelenkov, Nikolai; Brennan, Dylan P.; Yang, James; Podesta, Mario

doi:10.1017/s0022377822000952

Thermal ion kinetic effects and Landau damping in fishbone modes

Journal Article · Mon Nov 28 00:00:00 EST 2022 · Journal of Plasma Physics

DOI:https://doi.org/10.1017/s0022377822000952· OSTI ID:1905773

^[1]; ^[1]; Bao, Jian ^[2]; ^[1]; ^[1]; ^[1]; ^[1]

Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Chinese Academy of Sciences (CAS), Beijing (China)

We report the kinetic–magnetohydrodynamic (MHD) hybrid simulation approach for macroscopic instabilities in plasmas can be extended to include the kinetic effects of both thermal ions and energetic ions. The new coupling scheme includes synchronization of the density and parallel velocity between thermal ions and MHD, in addition to pressure coupling, to ensure the quasineutrality condition and avoid numerical errors. The new approach has been implemented in the kinetic-MHD code M3D-C1-K, and was used to study the thermal ion kinetic effects and Landau damping in fishbone modes in both DIII-D and NSTX. It is found that the thermal ion kinetic effects can cause an increase of the frequencies of the non-resonant n = 1 fishbone modes driven by energetic particles for q_min >1, and Landau damping can provide additional stabilization effects. A nonlinear simulation for n = 1 fishbone mode in NSTX is also performed, and the perturbation on magnetic flux surfaces and the transport of energetic particles are calculated.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1905773

Journal Information:: Journal of Plasma Physics, Journal Name: Journal of Plasma Physics Journal Issue: 6 Vol. 88; ISSN 0022-3778

Publisher:: Cambridge University PressCopyright Statement

Country of Publication:: United States

Language:: English

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