Study of high-beta magnetohydrodynamic modes and fast-ion losses in PDX

K. McGuire, Robert James Goldston, M. Bell, M. Bitter, K. Bol, K. Brau, D. Buchenauer, T. Crowley, S. Davis, F. Dylla, H. Eubank, H. Fishman, R. Fonck, B. Grek, R. Grimm, R. Hawryluk, H. Hsuan, R. Hulse, R. Izzo, R. KaitaS. Kaye, H. Kugel, D. Johnson, J. Manickam, D. Manos, D. Mansfield, E. Mazzucato, R. McCann, D. McCune, D. Monticello, R. Motley, D. Mueller, K. Oasa, M. Okabayashi, K. Owens, W. Park, M. Reusch, N. Sauthoff, G. Schmidt, S. Sesnic, J. Strachan, C. Surko, R. Slusher, H. Takahashi, F. Tenney, P. Thomas, H. Towner, J. Valley, R. White

Research output: Contribution to journalArticlepeer-review

351 Scopus citations


Strong magnetohydrodynamic activity has been observed in PDX neutral-beam-heated discharges. It occurs for Tq>~0.045 and is associated with a significant loss of fast ions and a drop in neutron emission. As much as 20%-40% of the beam heating power may be lost. The instability occurs in repetitive bursts of oscillations of 1 msec duration at 1-6-msec intervals. The magnetohydrodynamic activity has been dubbed the "fishbone instability" from its characteristic signature on the Mirnov coils.

Original languageEnglish (US)
Pages (from-to)891-895
Number of pages5
JournalPhysical review letters
Issue number12
StatePublished - 1983

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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