Journal
JOURNAL OF PLASMA PHYSICS
Volume 86, Issue 4, Pages -Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022377820000756
Keywords
plasma devices; plasma confinement; fusion plasma
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Funding
- US DOE [DE-FG02-93ER54222, UW2020, 135AAD3116]
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Finding coil sets with desirable physics and engineering properties is a crucial step in the design of modern stellarator devices. Existing stellarator coil optimization codes ultimately produce zero-thickness filament coils. However, stellarator coils have finite depth and thickness, which can make the single-filament model a poor approximation, particularly when coil build dimensions are relatively large compared to the coil-plasma distance. In this paper, we present a new method for designing coils with finite builds and present a mechanism to optimize the orientation of the winding pack. We approximate finite-build coils with a multi-filament model. A numerical implementation has been developed, and applications to the Helically Symmetric eXperiment stellarator and a new UW-Madison quasihelically symmetric configuration are shown.
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