It is shown that island-induced bootstrap current density, which results from the symmetry breaking of the ∫B∫ when an island is embedded in the equilibrium magnetic field B, modifies the evolution equation and the saturation level for a thin magnetic island in tokamaks. This modification is independent of the fraction of the equilibrium bootstrap current density. It is found that island-induced bootstrap current density increases the saturation level for modes with positive values of Δ′. Here, Δ′ is the stability parameter for the linear tearing modes.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics