Micro-tearing stability in tokamaks
The resonant layer equations governing tearing and micro-tearing modes in toroidal geometry are formulated and solved for a plasma in the banana regime and for wavelengths in the intermediate collisionality range. It is shown that stability of such tearing modes is determined by a competition between destabilising trapped electron dissipation and stabilising effects arising from ion magnetisation and collisional broadening of the passing-electron Landau resonance. Analytic stability criteria are derived, but for realistic parameters these modes are predicted to be stable.
Bibliographic Reference: Report: CLM-P878 EN (1990) 19pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
Record Number: 199010994 / Last updated on: 1994-12-01
Original language: en
Available languages: en