Next Steps in Quasi-Axisymmetric Stellarator Research
Authors: G.H. Neilson, D.A. Gates, P.J. Heitzenroeder, J. Breslau, S.C. Prager, T. Stevenson, P. Titus, M.D. Williams, and M.C. Zarnstorff
Abstract:
TThe quasi-axisymmetric (QA) stellarator, a three-dimensional magnetic configuration with close connections to tokamaks, offers solutions for a steady-state, disruption-free fusion system. A new experimental facility, QUASAR, provides a rapid approach to the next step in QA development, an integrated experimental test of its physics properties, taking advantage of the designs, fabricated components, and detailed assembly plans developed for the NCSX project. A scenario is presented for constructing the QUASAR facility for physics research operations starting in 2019. A facility for the step beyond QUASAR, performance extension to high temperature, high pressure sustained plasmas, is described. Operating in DD, such a facility would investigate the scale-up in size and pulse length from QUASAR, while a suitably equipped version operating in DT could address fusion nuclear missions. New QA optimization
strategies, aimed at improved engineering attractiveness, would also be tested.
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Presented at SOFE 2013
To be published in Transactions on Plasma Science
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Download PPPL-4946 (pdf 6.5 MB 6 pp)
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