Suppression of Energetic Particle Driven Instabilities with HHFW Heating
Authors: E. D. Fredrickson, G. Taylor, N. Bertelli, D. S. Darrow, N. Gorelenkov, G. Kramer, D. Liu, N.A. Crocker, S. Kubota, R. White
Abstract: In plasmas in the National Spherical Torus Experiment (NSTX) [Ono et al., Nucl. Fusion 40 (2000) 557] heated with neutral beams, the beam ions typically excite Energetic Particle Modes (EPMs or fishbones), and Toroidal, Global or Compressional Alfvén Eigenmodes (TAE, GAE, CAE). These modes can redistribute the energetic beam ions, altering the beam driven current profile and the plasma heating profile, or they may affect electron thermal transport or cause losses of the beam ions. In this paper we present experimental results where these instabilities, driven by the super-thermal beam ions, are suppressed with the application of High Harmonic Fast Wave heating.
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Published in: 2015 Nucl. Fusion 55 013012
doi:10.1088/0029-5515/55/1/013012
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