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The resistive ballooning mode is studied in a separatix geometry for parameters consistent with the H-mode. Besides the `usual' idea and resistive ballooning modes accessing a second stable regime at large plasma pressure gradients, another class of resistive ballooning modes is found, which does not stabilise as alpha increases. The properties of these modes are discussed in detail. Large pressure gradients associated with the H-mode, near the separatrix, can destabilise this class of rapidly growing resistive ballooning modes. Since these modes are stabilised by increasing plasma pressure, the possibility of a second stable window also exists for these resistive ballooning modes.

Additional information

Authors: HENDER T C, Culham Laboratory, Abingdon, Oxon (GB);ZEHRFELD H P, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);GRASSIE K, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: CLM-P857 EN (1989)
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
Record Number: 198910454 / Last updated on: 1994-12-01
Original language: en
Available languages: en