Onset of high-n ballooning modes during tokamak sawtooth crashes

Y. Nishimura, J. D. Callen, C. C. Hegna

Research output: Contribution to journalConference articlepeer-review

24 Citations (Scopus)


A new phenomenon has been found during the nonlinear stage of the tokamak sawtooth crash in relatively high β plasmas. The m/n=1/1 magnetic island evolution gives rise to convection of the pressure inside the q=1 radius and builds up steep pressure gradient across the island separatrix, and thereby trigger ballooning instabilities below the threshold at the equilibrium. Effects of the ballooning modes on the magnetic reconnection process during the sawtooth crash are discussed.

Original languageEnglish
Pages (from-to)4685-4692
Number of pages8
JournalPhysics of Plasmas
Issue number12
Publication statusPublished - 1999 Dec
EventProceedings of the 1999 APS Centennial Meeting - Atlanta, GA, United States
Duration: 1999 Mar 201999 Mar 26

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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