Recent advances in the design of quasiaxisymmetric stellarator plasma configurations

Citation
A. Reiman et al., Recent advances in the design of quasiaxisymmetric stellarator plasma configurations, PHYS PLASMA, 8(5), 2001, pp. 2083-2094
Citations number
36
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
8
Issue
5
Year of publication
2001
Part
2
Pages
2083 - 2094
Database
ISI
SICI code
1070-664X(200105)8:5<2083:RAITDO>2.0.ZU;2-F
Abstract
Strategies for the improvement of quasiaxisymmetric stellarator configurati ons are explored. Calculations of equilibrium flux surfaces for candidate c onfigurations are also presented. One optimization strategy is found to gen erate configurations with improved neoclassical confinement, simpler coils with lower current density, and improved flux surface quality relative to p revious designs. The flux surface calculations find significant differences in the extent of islands and stochastic regions between candidate configur ations. (These calculations do not incorporate the predicted beneficial eff ects of perturbed bootstrap currents.) A method is demonstrated for removin g low order islands from candidate configurations by relatively small modif ications of the configuration. One configuration is identified as having pa rticularly desirable properties for a proposed experiment. (C) 2001 America n Institute of Physics.