Kink–ballooning mode in circular tokamak plasma
Source abstract
Abstract
Peeling–ballooning modes, which are driven by gradients of parallel current and pressure in the pedestal, are widely accepted as the instability triggering large Edge Localized Modes (ELMs). However, the current-driven mode related to ELMs is not fully understood. This paper is about comparing the kink mode to the peeling mode, and the modified current profiles are specifically made to be simultaneously kink stable/peeling unstable or vice versa so that the two modes (or the modes coupled to peeling modes) can be compared. Caltrans-Corsica is used to generate a series of equilibria with modified edge current profiles. Based on these equilibria, the effects of edge current density on plasma instabilities are studied with the three-field BOUT++ elm-pb code. The results suggest that kink–ballooning modes can drive ELMs in some peeling-stable regions. Compared to the peeling–ballooning mode, kink–ballooning modes have comparatively lower poloidal resonant modes and growth rates at low toroidal mode numbers.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic confinement fusion research · Ionosphere and magnetosphere dynamics · Physics of Superconductivity and Magnetism
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Southwestern Institute of Physics 1 , Chengdu 610041, China
York Plasma Institue, Physics Department, University of York 2 , York YO10 5DD, United Kingdom
College of Physics, Sichuan University 3 , Chengdu 610064, People’s Republic of China
Lawrence Livermore National Laboratory 4 , Livermore, California 94550, USA
Funding
Young Scientists Fund · National Natural Science Foundation of China · The National MCF Energy R&D Program of China
References (20)
Show source-provided references
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