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Effect of quasihelical symmetry on trapped-electron mode transport in the HSX stellarator

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Guttenfelder, W., Lore, J., Anderson, David T., Anderson, F. S. B., Canik, J. M., Dorland, William Douglass, Likin, K. M. and Talmadge, Joseph Nathan (2008) Effect of quasihelical symmetry on trapped-electron mode transport in the HSX stellarator. Physical Review Letters, Vol.101 (No.21). doi:10.1103/PhysRevLett.101.215002

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.101.215002

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Abstract

This Letter presents theory-based predictions of anomalous electron thermal transport in the Helically Symmetric eXperiment stellarator, using an axisymmetric trapped-electron mode drift wave model. The model relies on modifications to a tokamak geometry that approximate the quasihelical symmetry in the Helically Symmetric eXperiment (particle trapping and local curvature) and is supported by linear 3D gyrokinetic calculations. Transport simulations predict temperature profiles that agree with experimental profiles outside a normalized minor radius of rho > 0.3 and energy confinement times that agree within 10% of measurements. The simulations can reproduce the large measured electron temperatures inside rho < 0.3 if an approximation for turbulent transport suppression due to shear in the radial electric field is included.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Stellarators, Electron transport
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 21 November 2008
Dates:
DateEvent
21 November 2008Published
Volume: Vol.101
Number: No.21
Number of Pages: 4
DOI: 10.1103/PhysRevLett.101.215002
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: United States. Dept. of Energy
Grant number: DE-FG02-93ER54222 (DoE), DE-FC02-04ER54784 (DoE)

Data sourced from Thomson Reuters' Web of Knowledge

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