Onset of high-{ital n} ballooning modes during tokamak sawtooth crashes
- Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706-1687 (United States)
A new phenomenon has been found during the nonlinear stage of the tokamak sawtooth crash in relatively high {beta} 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. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 690718
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 6; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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