STABILISATION OF DRIFT-TEARING MODES AT THE BREAKDOWN OF THE CONSTANT-PSI APPROXIMATION
The growth rate of the linearised drift-tearing mode is found to be a non-monotonic function of the stability parameter D. It reaches a maximum for D approx. 0.5, D(1) greater than 0 and becomes negative for D greater than or equal to D(1), corresponding to the regime where the constant-psi approximation breaks down. A second mode, identified as the diamagnetic modification of the n(1 3) mode near the condition for ideal magnetohydrodynamics marginal stability, becomes unstable for D greater than or equal to D(2) greater than D(1), leaving a stable window of values of D.
Bibliographic Reference: REPORT: JET-P(90)08 EN (1990) 13PP. AVAILABLE FROM THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON. OX14 3EA (GB)
Record Number: 1989128099700 / Last updated on: 1990-11-02
Original language: EN
Available languages: en