A New Optimized Quasihelically SymmetricStellarator

A new optimized quasihelically symmetric configuration is described that has the desir-able properties of improved energetic particle confinement, reduced turbulent transportby 3D shaping, and non-resonant divertor capabilities. The configuration presented in thispaper is explicitly optimized for qu...

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Bibliographic Details
Published in:arXiv.org 2020-04
Main Authors: Bader, A, Faber, B J, Schmitt, J C, Anderson, D T, Drevlak, M, Duff, J M, Frerichs, H, Hegna, C C, Kruger, T G, Landreman, M, McKinney, I J, Singh, L, Schroeder, J M, Terry, P W, Ware, A S
Format: Article
Language:English
Subjects:
Coils
Configurations
Confinement
Energetic particles
Heat flux
Optimization
Plasma pressure
Stability analysis
Symmetry
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Summary:A new optimized quasihelically symmetric configuration is described that has the desir-able properties of improved energetic particle confinement, reduced turbulent transportby 3D shaping, and non-resonant divertor capabilities. The configuration presented in thispaper is explicitly optimized for quasihelical symmetry, energetic particle confinement,neoclassical confinement, and stability near the axis. Post optimization, the configurationwas evaluated for its performance with regard to energetic particle transport, idealmagnetohydrodynamic (MHD) stability at various values of plasma pressure, and iontemperature gradient instability induced turbulent transport. The effect of discrete coilson various confinement figures of merit, including energetic particle confinement, aredetermined by generating single-filament coils for the configuration. Preliminary divertoranalysis shows that coils can be created that do not interfere with expansion of thevessel volume near the regions of outgoing heat flux, thus demonstrating the possibilityof operating a non-resonant divertor.
ISSN:2331-8422
DOI:10.48550/arxiv.2004.11426