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.
|Number of pages||8|
|Journal||Physics of Plasmas|
|Publication status||Published - 1999 Dec|
|Event||Proceedings of the 1999 APS Centennial Meeting - Atlanta, GA, United States|
Duration: 1999 Mar 20 → 1999 Mar 26
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics