Drift mode calculations in nonaxisymmetric geometry

Journal Article · Wed Dec 01 00:00:00 EST 1999 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.873757· OSTI ID:690720

Rewoldt, G; Ku, L; Tang, W M ^[1]; Cooper, W A ^[2]

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1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543-0451 (United States)
2. Centre de Recherche en Physique des Plasmas, Ecole Polytechnique Federale de Lausanne, PPB Ecublens, CH-1015 Lausanne (Switzerland)

A fully kinetic assessment of the stability properties of toroidal drift modes has been obtained for nonaxisymmetric (stellarator) geometry, in the electrostatic limit. This calculation is a comprehensive solution of the linearized gyrokinetic equation, using the lowest-order {open_quotes}ballooning representation{close_quotes} for high toroidal mode number instabilities, with a model collision operator. Results for toroidal drift waves destabilized by temperature gradients and/or trapped particle dynamics are presented, using three-dimensional magnetohydrodynamic equilibria generated as part of a design effort for a quasiaxisymmetric stellarator. Comparisons of these results with those obtained for typical tokamak cases indicate that the basic trends are similar. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 690720
• Journal Information: Physics of Plasmas, Vol. 6, Issue 12; Other Information: PBD: Dec 1999
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
DRIFT INSTABILITY
PLASMA WAVES
PLASMA DRIFT
KINETICS
MHD EQUILIBRIUM
STELLARATORS
TOROIDAL CONFIGURATION
TEMPERATURE DISTRIBUTION
GEOMETRY
PLASMA SIMULATION
BALLOONING INSTABILITY
PLASMA CONFINEMENT