Evidence from numerical simulations of transport-barrier relaxations in tokamak edge plasmas in the presence of electromagnetic fluctuations.
The dynamics of transport barriers in fusion plasmas is studied in the presence of electromagnetic fluctuations. The work is based on numerical simulations using a new three-dimensional electromagnetic fluid turbulence code (EMEDGE3D). In these simulations, the transport-barrier exhibits intermittent relaxation cycles. It is found that magnetic fluctuations have a negligible influence on the relaxation process while the magnetic activity is enhanced during these relaxations, in agreement with experimental observations.
Fuhr
G
G
France-Japan Magnetic Fusion Laboratory, LIA 336 CNRS/UMR 6633, CNRS-Université de Provence, Case 321, 13397 Marseille Cedex 20, France.
Beyer
P
P
Benkadda
S
S
Garbet
X
X