Theoretical modelling of the feedback stabilization of external MHD modes in toroidal geometry

M. S. Chance, Ming-Sheng Chu, M. Okabayashi, A. D. Turnbull

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A theoretical framework for understanding the feedback mechanism for stabilization of external MHD modes has been formulated. Efficient computational tools-the GATO stability code coupled with a substantially modified VACUUM code-have been developed to effectively design viable feedback systems against these modes. The analysis assumed a thin resistive shell and a feedback coil structure accurately modelled in θ and ø, albeit with only a single harmonic variation in ø. Time constants and induced currents in the enclosing resistive shell are calculated. An optimized configuration based on an idealized model has been computed for the DIII-D device. Up to 90% of the effectiveness of an ideal wall can be achieved.

Original languageEnglish
Pages (from-to)295-300
Number of pages6
JournalNuclear Fusion
Volume42
Issue number3
DOIs
Publication statusPublished - 2002 Mar 1

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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