A comparison of sawtooth oscillations in bean and oval shaped plasmas

E. A. Lazarus, F. L. Waelbroeck, T. C. Luce, M. E. Austin, K. H. Burrell, J. R. Ferron, A. W. Hyatt, T. H. Osborne, M. S. Chu, D. P. Brennan, P. Gohil, R. J. Groebner, C. L. Hsieh, R. J. Jayakumar, L. L. Lao, J. Lohr, M. A. Makowski, C. C. Petty, P. A. Politzer, R. PraterT. L. Rhodes, J. T. Scoville, E. J. Strait, A. D. Turnbull, M. R. Wade, G. Wang, H. Reimerdes, C. Zhang

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26 引文 斯高帕斯(Scopus)

摘要

The effect of plasma shape on sawtooth oscillations in the DIII-D tokamak plasmas is investigated by comparing discharges with cross-sections shaped like a bean and an oval. The two shapes are designed so that the Mercier instability threshold is reached when the axial safety factor is below unity for the bean and above unity for the oval cross-sections. This allows the role of interchange modes to be differentiated from that of the kink-tearing mode. The differences in the nature of the sawtooth oscillations in the bean and oval discharges are found to be determined primarily by extreme differences in the electron heat transport during the reheat. In both cases, the axial safety factor is found to be near unity following the crash.

原文English
文章編號L01
頁(從 - 到)L65-L72
期刊Plasma Physics and Controlled Fusion
48
發行號8
DOIs
出版狀態Published - 2006 8月 1

All Science Journal Classification (ASJC) codes

  • 核能與工程
  • 凝聚態物理學

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