Active feedback stabilization of the resistive wall mode on the DIII-D device

M. Okabayashi, J. Bialek, M. S. Chance, M. S. Chu, E. D. Fredrickson, A. M. Garofalo, M. Gryaznevich, R. E. Hatcher, T. H. Jensen, L. C. Johnson, R. J. La Haye, E. A. Lazarus, M. A. Makowski, J. Manickam, G. A. Navratil, J. T. Scoville, E. J. Strait, A. D. Turnbull, M. L. Walker

研究成果: Conference article同行評審

117 引文 斯高帕斯(Scopus)

摘要

A proof of principle magnetic feedback stabilization experiment has been carried out to suppress the resistive wall mode (RWM), a branch of the ideal magnetohydrodynamic (MHD) kink mode under the influence of a stabilizing resistive wall, on the DIII-D tokamak device [Plasma Phys. Controlled Fusion Research (International Atomic Energy Agency, Vienna, 1986), p. 159; Phys. Plasmas 1, 1415 (1994)]. The RWM was successfully suppressed and the high beta duration above the no-wall limit was extended to more than 50 times the resistive wall flux diffusion time. It was observed that the mode structure was well preserved during the time of the feedback application. Several lumped parameter formulations were used to study the feedback process. The observed feedback characteristics are in good qualitative agreement with the analysis. These results provide encouragement to future efforts towards optimizing the RWM feedback methodology in parallel to what has been successfully developed for the n = 0 vertical positional control. Newly developed MHD codes have been extremely useful in guiding the experiments and in providing possible paths for the next step.

原文English
頁(從 - 到)2071-2082
頁數12
期刊Physics of Plasmas
8
發行號5 II
DOIs
出版狀態Published - 2001 五月
事件42nd Annual Meeting of the APS Division of Plasma Physics - Quebec, Que, Canada
持續時間: 2000 十月 232000 十月 27

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學

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