Drift mode calculations in nonaxisymmetric geometry

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. (C) 1999 American Institute of Physics. [S1070- 664X(99)03212-7].


Published in:
Physics of Plasmas, 6, 12, 4705-4713
Year:
1999
ISSN:
1070-664X
ISBN:
1070-664X
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-01-28


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