Absence of Complete Finite-Larmor-Radius Stabilization in Extended MHD
Journal Article
·
· Physical Review Letters
- Center for Plasma Theory and Computation, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)
The dominant finite-Larmour-radius (FLR) stabilization effects on interchange instability can be retained by taking into account the ion gyroviscosity or the generalized Ohm's law in an extended MHD model. However, recent simulations and theoretical calculations indicate that complete FLR stabilization of the interchange mode may not be attainable by ion gyroviscosity or the two-fluid effect alone in the framework of extended MHD. For a class of plasma equilibria in certain finite-{beta} or nonisentropic regimes, the critical wave number for complete FLR stabilization tends toward infinity.
- OSTI ID:
- 21134159
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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