Response of a resistive and rotating tokamak to external magnetic perturbations below the Alfvén frequency

M. S. Chu, L. L. Lao, M. J. Schaffer, T. E. Evans, E. J. Strait, Y. Q. Liu, M. J. Lanctot, H. Reimerdes, Y. Liu, T. A. Casper, Yuri Gribov

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11 引文 斯高帕斯(Scopus)

摘要

Motivated by the recent experimental observation that plasma stability can be improved by external magnetic perturbations, the general problem of plasma response to external magnetic perturbations is investigated. Different (vacuum, ideal and resistive) plasma response models are considered and compared. Plasma response, in experiments where stabilization was achieved, is obtained through computation using the MARS-F code, with a plasma model that includes both plasma resistivity and rotation. The resultant magnetic field line stochasticity is much reduced from that obtained formerly using the vacuum plasma model. This reduced stochasticity is more consistent with the favourable experimental observation of enhanced stability. Examples are given for the response of an ITER plasma to perturbations generated by the correction coils; and the response of a plasma to external coils (antenna) up to the Alfvén frequency.

原文English
文章編號073036
期刊Nuclear Fusion
51
發行號7
DOIs
出版狀態Published - 2011 七月

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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