Drift Mode Calculations in Nonaxisymmetric Geometry

Technical Report · Thu Jul 01 00:00:00 EDT 1999

DOI:https://doi.org/10.2172/9115· OSTI ID:9115

Rewoldt, G; Ku, L -P; Cooper, W A; Tang, W M

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 ''ballooning representation'' 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.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 9115
• Report Number(s): PPPL-3354; DE-AC02-76CHO3073; DE-AC02-76CHO3073; TRN: US0102749
• Resource Relation: Other Information: PBD: 1 Jul 1999
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
STELLARATORS
DRIFT INSTABILITY
DESIGN
ELECTROSTATICS
GEOMETRY
KINETICS
MAGNETOHYDRODYNAMICS
THREE-DIMENSIONAL CALCULATIONS