Interaction of scrape-off layer currents with magnetohydrodynamical instabilities in tokamak plasmas
نویسنده
چکیده
A simple theoretical model is developed which describes how current eddies are excited in the scrape-off layer SOL of a large-aspect-ratio, low, circular cross-section tokamak by time-varying magnetohydrodynamical instabilities originating from within the plasma. This model is used to study the interaction of SOL currents with tearing modes and resistive wall modes in a typical tokamak plasma. SOL currents are found to be fairly effective at braking the rotation of tearing modes, and to have a significant destabilizing effect on resistive wall modes. © 2007 American Institute of Physics. DOI: 10.1063/1.2747624
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