Drift Mode Calculations in Nonaxisymmetric Geometry

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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.

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354 Kilobytes pages

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Rewoldt, G.; Ku, L.-P.; Cooper, W.A. & Tang, W.M. July 1, 1999.

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Description

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.

Physical Description

354 Kilobytes pages

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INIS; OSTI as DE00009115

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  • Other Information: PBD: 1 Jul 1999

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  • Report No.: PPPL-3354
  • Report No.: DE-AC02-76CHO3073
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/9115 | External Link
  • Office of Scientific & Technical Information Report Number: 9115
  • Archival Resource Key: ark:/67531/metadc794509

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  • July 1, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • Aug. 5, 2016, 11:50 a.m.

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Rewoldt, G.; Ku, L.-P.; Cooper, W.A. & Tang, W.M. Drift Mode Calculations in Nonaxisymmetric Geometry, report, July 1, 1999; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc794509/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.