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

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295 Scopus citations

Abstract

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
Volume50
Issue number12
DOIs
StatePublished - Jan 1 1983

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    McGuire, K., Goldston, R. J., Bell, M., Bitter, M., Bol, K., Brau, K., Buchenauer, D., Crowley, T., Davis, S., Dylla, F., Eubank, H., Fishman, H., Fonck, R., Grek, B., Grimm, R., Hawryluk, R., Hsuan, H., Hulse, R., Izzo, R., ... White, R. (1983). Study of high-beta magnetohydrodynamic modes and fast-ion losses in PDX. Physical review letters, 50(12), 891-895. https://doi.org/10.1103/PhysRevLett.50.891