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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.

Additional information

Authors: PORCELLI F, JET Joint Undertaking, Abingdon, Oxon. (GB);MIGLIUOLO S, Massachusetts Institute of Technology, Cambridge (US);PEGORARO F, Scuola Normale Superiore, Pisa (IT)
Bibliographic Reference: Report: JET-P(90)08 EN (1990) 13pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199011000 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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