THERMAL INSTABILITIES AND POLOIDAL ASYMMETRIES IN THE TOKAMAK EDGE PLASMA
The thermal stability of the collisional, radiating edge plasma of magnetic confinement experiments is investigated analytically and numerically. A fluid description is used including a non-local electron heat flux model and non-equilibrium impurity radiation cooling. The dispersion relation of a homogeneous plasma is derived analytically and stability criteria are given. Various experimental scenarios are simulated with a sophisticated numerical model, demonstrating the formation and history of global and local "marfes" and relaxation oscillations under appropriate conditions. These results compare well with experiment even in many details, proving in turn the relevance of the model.
Bibliographic Reference: WRITE TO MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, 8046 GARCHING BEI MUENCHEN (GERMANY), MENTIONING REPORT IPP 5/8, 1985
Record Number: 1989124103700 / Last updated on: 1987-01-01
Available languages: en