Simulations of the core/SOL transition of a tokamak plasma. Frederic Schwander ,Ph. Ghendrih, Y. Sarazin IRFM/CEA Cadarache G. Ciraolo, E. Serre, L. Isoardi, G. Chiavassa M2P2, Marseille. Technological impacts of the study of edge turbulence.
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Simulations of the core/SOL transition of a tokamak plasma
Frederic Schwander,Ph. Ghendrih, Y. Sarazin IRFM/CEA Cadarache
G. Ciraolo, E. Serre, L. Isoardi, G. Chiavassa
Field lines intersect limiter on inboard and outboard side
Shear in momentum and densityat the transition:
Triggering of instabilities ?
Particle conservation (n paticle density)
Momentum conservation (Γ parallel momentum)
Additional equation – electric drift
Acoustic waves: finite parallel wavenumber
Drift waves : finite perpendicular wavenumber
Dynamics only accessible through 3D simulations
Systematic convergence of axisymmetric computation towards steady state.
Natural radial stratification in density,
Large Mach number flows limited to scrape-off layer.
Linear instability of mode with toroidal wavenumber n=1.
Localized on corner of limiter