Observation of compressional Alfvén modes during neutral-beam heating on the National Spherical Torus Experiment

E. D. Fredrickson, N. Gorelenkov, C. Z. Cheng, R. Bell, D. Darrow, D. Johnson, S. Kaye, B. LeBlanc, J. Menard, S. Kubota, W. Peebles

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Abstract

Multiple, coherent modes at frequencies up to the deuterium ion cyclotron frequency were observed during neutral-beam injection heating of the National Spherical Torus Experiment (NSTX). The modes were seen mainly in the frequency range of 0.4-2.5 MHz. The modes were identified as compressional Alfven waves excited by a resonant interaction with the energetic beam ions.

Original languageEnglish
Article number145001
Pages (from-to)145001/1-145001/4
JournalPhysical review letters
Volume87
Issue number14
DOIs
Publication statusPublished - 2001 Oct 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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