Sherwood 2015

Abstract Details

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Gyrokinetic particle simulation of current-driven instabilities in fusion plasmas

Author: Joseph T McClenaghan
Requested Type: Poster Only
Submitted: 2015-01-19 15:40:25

Co-authors: Y. Qi, D.J. Liu, Z. Lin, I. Holod, W. Deng, Z. Wang

Contact Info:
UC Irvine
4169 Fredrick Reines Hall
Irvine, CA   92697

Abstract Text:
The gyrokinetic toroidal code (GTC) capability has been extended for simulating internal kink, resistive tearing[1], and fishbone instabilities with kinetic effects in toroidal geometry. The global simulation domain covers the magnetic axis, which is necessary for simulating current-driven instabilities. Gyrokinetic simulations of the kink modes in the toroidal geometry find that ion kinetic effects significantly reduce the growth rate even when the banana orbit width is much smaller than the radial width of the perturbed current layer at the mode rational surface. Next, using a realistic DIII-D geometry, a fishbone mode is simulated and is observed to have a finite frequency due to precession resonance with trapped fast ions. The kinetic effects of thermal ions on the properties of the fishbone mode will also be examined. The simulation results will be compared to DIII-D measurement.
[1]Liu, Dongjian, et al., PoP, 21.12 (2014): 122520.


March 16-18, 2015
The Courant Institute, New York University