AXISYMMETRIC STABILITY OF A HIGHLY ELONGATED TOKAMAK PLASMA - A NEW METHOD AND INITIAL RESULTS
A new method is presented for computing global axisymmetric instabilities of tokamak plasmas in a conducting shell. The method uses a free boundary equilibrium code to find displacement vectors compatible with ideal MHD. It is applied to the computation of vertical instability growth rates of highly elongated, racetrack shaped plasmas. Results obtained for up-down symmetric configurations are compared with ERATO calculations. The effects of plasma - wall distance, plasma pressure and current profile are analyzed. In addition, it is shown that an important stabilizing effect can be obtained by displacing the shell vertically with respect to the plasma.
Bibliographic Reference: WRITE TO CONFEDERATION SUISSE, CENTRE DE RECHERCHES EN PHYSIQUE DES PLASMAS, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE, 21 AVENUE DES BAINS, CH-1007 LAUSANNE (SWITZERLAND), MENTIONING REPORT LRP 266/85.
Record Number: 1989124060300 / Last updated on: 1987-01-01
Available languages: en