Advancing the physics basis for quasi-helically symmetric stellarators
| Autor: | Andrew Ware, Chris Hegna, Michael Drevlak, B. J. Faber, Matt Landreman, I. J. McKinney, Paul Terry, J.C. Schmitt, J. M. Schroeder, Thomas Kruger, Heinke Frerichs, Aaron Bader, J. M. Duff, David G. Anderson, Luquant Singh |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Plasma Physics |
| ISSN: | 1469-7807 0022-3778 |
| Popis: | A new optimized quasi-helically symmetric configuration is described that has the desirable properties of improved energetic particle confinement, reduced turbulent transport by three-dimensional shaping and non-resonant divertor capabilities. The configuration presented in this paper is explicitly optimized for quasi-helical symmetry, energetic particle confinement, neoclassical confinement and stability near the axis. Post optimization, the configuration was evaluated for its performance with regard to energetic particle transport, ideal magnetohydrodynamic stability at various values of plasma pressure and ion temperature gradient instability induced turbulent transport. The effects of discrete coils on various confinement figures of merit, including energetic particle confinement, are determined by generating single-filament coils for the configuration. Preliminary divertor analysis shows that coils can be created that do not interfere with expansion of the vessel volume near the regions of outgoing heat flux, thus demonstrating the possibility of operating a non-resonant divertor. |
| Databáze: | OpenAIRE |
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