Skin Currents and Compound Sawteeth in Tokamaks
- 9 June 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 56 (23), 2477-2480
- https://doi.org/10.1103/physrevlett.56.2477
Abstract
Two-dimensional MHD simulations are carried out which demonstrate that the cross-field thermal conduction near the magnetic axis controls the structure of sawteeth in tokamaks. In simulations of discharges with good central confinement, skin currents form at a finite radius causing the safety factor to fall below 1 away from the magnetic axis. Both normal and compound sawteeth are produced which have many features consistent with experimental observations.
Keywords
This publication has 5 references indexed in Scilit:
- Double-sawtooth oscillations in the Doublet III tokamakNuclear Fusion, 1985
- Linear analysis of the double-tearing modePhysics of Fluids, 1980
- Numerical studies of nonlinear evolution of kink modes in tokamaksPhysics of Fluids, 1976
- Relaxation Instability in TokamaksPhysical Review Letters, 1976
- Studies of Internal Disruptions andOscillations in Tokamak Discharges with Soft—X-Ray TecniquesPhysical Review Letters, 1974