Highβ and ECRH studies in DIII-D

R. Stambaugh, S. Allen, G. Bramson, N. Brooks, K. H. Burrell, R. Callis, T. Carlstrom, M. Chance, M. Chu, A. Colleraine, D. Content, J. Deboo, J. Ferron, H. Fukumoto, P. Gohil, N. Gottardi, R. J. Groebner, G. Haas, W. Heidbrink, D. HillR. Hong, N. Hosogane, W. Howl, C. Hsieh, G. L. Jackson, G. Jahns, R. James, A. Kellman, J. Kim, S. Konshita, L. Lao, E. Lazarus, J. Lohr, P. Lomas, J. Luxon, M. Mahdavi, M. Matsuoka, M. Mayberry, C. P. Moeller, N. Ohyabu, T. Osborne, D. Overskei, T. Ozeki, S. Perkins, P. Petersen, M. Perry, T. Petrie, J. Phillips, G. Porter, R. Prater, M. Rensink, D. Schissel, J. Scoville, R. Seraydarian, M. Shimada, T. Simonen, R. T. Snider, B. Stallard, R. Stav, H. St John, R. Stockdale, E. J. Strait, T. S. Taylor, A. Turnbull

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The DIII-D high and low beta stability results have established the basic feasibility of the divertor and H-mode configurations up to elongation 2.0 for next generation tokamaks. The 6.8% beta T achieved has already exceeded projected operating requirements of next generation devices. beta T > 6% has been sustained for 800 ms. Stability calculations and patterns of MHD mode behavior suggest a central expanding zone of ballooning instabilities leads ultimately to unstable m/n=2/1 modes which cause beta collapse or disruption. The pressure gradient at the plasma edge just reaches the first regime ballooning limit prior to ELMs. ECRH has proven effective for generating H-mode, sawtooth suppression, and ELM suppression.

Original languageEnglish
Article number018
Pages (from-to)1585-1596
Number of pages12
JournalPlasma Physics and Controlled Fusion
Issue number11
Publication statusPublished - 1988

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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