Effect of chaos on plasma filament dynamics and turbulence in the scrape-off layer
作者： D. Meyerson , C. Michoski , F. Waelbroeck , W. Horton
DOI: 10.1063/1.4890349
关键词: Magnetic field 、 Turbulence 、 Field (physics) 、 Condensed matter physics 、 Length scale 、 Perturbation theory 、 Plasma 、 Resonant magnetic perturbations 、 Intermittency 、 Physics
摘要: Naturally occurring error fields as well resonant magnetic perturbations applied for stability control are known to cause field-line chaos in the scrape-off layer (SOL) region of tokamaks. Here, 2D simulations with BOUT++ simulation framework used investigate effect on SOL and particular its width peak particle flux. The enters dynamics only through connection length, which is evaluated using a Poincare map. variation experimentally relevant quantities, such gradient length scale intermittency flux SOL, described function strength perturbation. It found that broaden profile sheath-loss coefficient, proportional inverse length. That is, transport chaotic field equivalent model where coefficient replaced by average over unperturbed surfaces. does not include effects features other than parallel
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