Turbulent relaxation patterns in SOL plasma

Abstract Relaxations of localized over-density in a plane transverse to the magnetic field are numerically investigated under the effect of drift-wave and interchange drives in SOL conditions. Such a controlled departure from thermodynamic equilibrium allows the investigation of fundamental processe...

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Bibliographic Details
Published in:Plasma physics and controlled fusion 2024-08, Vol.66 (10)
Main Authors: Varennes, R, Dif-Pradalier, G, Ghendrih, P, Grandgirard, V, Panico, O, Sarazin, Y, Serre, E, Zarzoso, D.
Format: Article
Language:English
Subjects:
Physics
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Summary:Abstract Relaxations of localized over-density in a plane transverse to the magnetic field are numerically investigated under the effect of drift-wave and interchange drives in SOL conditions. Such a controlled departure from thermodynamic equilibrium allows the investigation of fundamental processes at play in cross-field transport. Interchange instabilities generate ballistic outward radial flux with low amplitude zonal flow patterns, whereas drift-wave instabilities result in symmetric radial flux with large amplitude zonal flow patterns. When both instabilities are considered, the combined effects tend to favor drift-waves, leading to a weaker outward flux with larger zonal flow patterns.
ISSN:0741-3335
1361-6587
DOI:10.1088/1361-6587/ad705c