Suppression of energetic particle driven instabilities with HHFW heating

Journal Article · Wed Dec 31 23:00:00 EST 2014 · 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 Laboratory (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-09CH11466
• OSTI ID: 1182196
• Alternate ID(s): OSTI ID: 22331244
• Report Number(s): PPPL--5058
• Journal Information: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 1 Vol. 55; ISSN 0029-5515
• Publisher: IOP Science
• Country of Publication: United States
• Language: English

Related Subjects

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