Plasma-limiter interactions during the q-MODE in TFTR

R. Budny, H. F. Dylla, A. B. Ehrhardt, E. D. Fredrickson, Robert James Goldston, S. J. Kilpatrick, D. C. McCune, K. McGuire, S. S. Medley, A. T. Ramsey, B. C. Stratton, M. Ulrickson

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Abstract

During the q-mode in TFTR, the Dα emissions decrease and the electron density, Zineff, and confinement times increase, as seen during the H-mode in other tokamaks. The interaction of surface islands with the limiter is believed to increase the carbon and electron concentration. Analysis of the deuterium recycling indicates that the recycling coefficient at the last closed flux surface decreases about 15% during the q-mode.

Original languageEnglish (US)
Pages (from-to)214-220
Number of pages7
JournalJournal of Nuclear Materials
Volume162-164
Issue numberC
DOIs
StatePublished - Apr 1 1989

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Keywords

  • TFTR
  • electron-density profile
  • plasma-limiter interaction
  • q-transitions

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    Budny, R., Dylla, H. F., Ehrhardt, A. B., Fredrickson, E. D., Goldston, R. J., Kilpatrick, S. J., McCune, D. C., McGuire, K., Medley, S. S., Ramsey, A. T., Stratton, B. C., & Ulrickson, M. (1989). Plasma-limiter interactions during the q-MODE in TFTR. Journal of Nuclear Materials, 162-164(C), 214-220. https://doi.org/10.1016/0022-3115(89)90272-9