Suppression of energetic particle driven instabilities with HHFW heating

Journal Article · Thu Jan 01 00:00:00 EST 2015 · Nuclear Fusion

DOI:https://doi.org/10.1088/0029-5515/55/1/013012· OSTI ID:1182196

Fredrickson, E. D. ^[1]; Taylor, G. ^[1]; Bertelli, N. ^[1]; Darrow, D. S. ^[1]; Gorelenkov, N. ^[1]; Kramer, G. ^[1]; Liu, D. ^[2]; Crocker, N. A. ^[3]; Kubota, S. ^[3]; White, R. ^[1]

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1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
2. University of California, Irvine, CA (United States)
3. University of California, Los Angeles (United States)

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.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-09CH11466
• OSTI ID: 1182196
• Report Number(s): PPPL-5058
• Journal Information: Nuclear Fusion, Vol. 55, Issue 1; ISSN 0029-5515
• Publisher: IOP Science
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Heating
ICRF
Alfve Waves
Fishbone Instability
Tokamaks
NSTX
Wave Interaction
Particles