Recent advances in the design of quasiaxisymmetric stellarator plasma configurations

A. Reiman; L. Ku; D. Monticello; S. Hirshman; S. Hudson; C. Kessel; E. Lazarus; D. Mikkelsen; M. Zarnstorff; L. A. Berry; A. Boozer; A. Brooks; W. A. Cooper; M. Drevlak; E. Fredrickson; G. Fu; Robert James Goldston; R. Hatcher; M. Isaev; C. Jun; S. Knowlton; J. Lewandowski; Z. Lin; J. F. Lyon; P. Merkel; M. Mikhailov; W. Miner; H. Mynick; G. Neilson; B. E. Nelson; C. Nührenberg; N. Pomphrey; M. Redi; W. Reiersen; P. Rutherford; R. Sanchez; J. Schmidt; D. Spong; D. Strickler; A. Subbotin; P. Valanju; R. White

doi:10.1063/1.1351826

Recent advances in the design of quasiaxisymmetric stellarator plasma configurations

A. Reiman, L. Ku, D. Monticello, S. Hirshman, S. Hudson, C. Kessel, E. Lazarus, D. Mikkelsen, M. Zarnstorff, L. A. Berry, A. Boozer, A. Brooks, W. A. Cooper, M. Drevlak, E. Fredrickson, G. Fu, Robert James Goldston, R. Hatcher, M. Isaev, C. JunS. Knowlton, J. Lewandowski, Z. Lin, J. F. Lyon, P. Merkel, M. Mikhailov, W. Miner, H. Mynick, G. Neilson, B. E. Nelson, C. Nührenberg, N. Pomphrey, M. Redi, W. Reiersen, P. Rutherford, R. Sanchez, J. Schmidt, D. Spong, D. Strickler, A. Subbotin, P. Valanju, R. White

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Abstract

Strategies for the improvement of quasiaxisymmetric stellarator configurations are explored. Calculations of equilibrium flux surfaces for candidate configurations are also presented. One optimization strategy is found to generate configurations with improved neoclassical confinement, simpler coils with lower current density, and improved flux surface quality relative to previous designs. The flux surface calculations find significant differences in the extent of islands and stochastic regions between candidate configurations. (These calculations do not incorporate the predicted beneficial effects of perturbed bootstrap currents.) A method is demonstrated for removing low order islands from candidate configurations by relatively small modifications of the configuration. One configuration is identified as having particularly desirable properties for a proposed experiment.

Original language	English (US)
Pages (from-to)	2083-2094
Number of pages	12
Journal	Physics of Plasmas
Volume	8
Issue number	5 II
DOIs	https://doi.org/10.1063/1.1351826
State	Published - May 2001
Event	42nd Annual Meeting of the APS Division of Plasma Physics - Quebec, Que, Canada Duration: Oct 23 2000 → Oct 27 2000

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.1351826

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Reiman, A., Ku, L., Monticello, D., Hirshman, S., Hudson, S., Kessel, C., Lazarus, E., Mikkelsen, D., Zarnstorff, M., Berry, L. A., Boozer, A., Brooks, A., Cooper, W. A., Drevlak, M., Fredrickson, E., Fu, G., Goldston, R. J., Hatcher, R., Isaev, M., ... White, R. (2001). Recent advances in the design of quasiaxisymmetric stellarator plasma configurations. Physics of Plasmas, 8(5 II), 2083-2094. https://doi.org/10.1063/1.1351826

@article{56a528c907674d88bc056855eae7056e,

title = "Recent advances in the design of quasiaxisymmetric stellarator plasma configurations",

abstract = "Strategies for the improvement of quasiaxisymmetric stellarator configurations are explored. Calculations of equilibrium flux surfaces for candidate configurations are also presented. One optimization strategy is found to generate configurations with improved neoclassical confinement, simpler coils with lower current density, and improved flux surface quality relative to previous designs. The flux surface calculations find significant differences in the extent of islands and stochastic regions between candidate configurations. (These calculations do not incorporate the predicted beneficial effects of perturbed bootstrap currents.) A method is demonstrated for removing low order islands from candidate configurations by relatively small modifications of the configuration. One configuration is identified as having particularly desirable properties for a proposed experiment.",

author = "A. Reiman and L. Ku and D. Monticello and S. Hirshman and S. Hudson and C. Kessel and E. Lazarus and D. Mikkelsen and M. Zarnstorff and Berry, {L. A.} and A. Boozer and A. Brooks and Cooper, {W. A.} and M. Drevlak and E. Fredrickson and G. Fu and Goldston, {Robert James} and R. Hatcher and M. Isaev and C. Jun and S. Knowlton and J. Lewandowski and Z. Lin and Lyon, {J. F.} and P. Merkel and M. Mikhailov and W. Miner and H. Mynick and G. Neilson and Nelson, {B. E.} and C. N{\"u}hrenberg and N. Pomphrey and M. Redi and W. Reiersen and P. Rutherford and R. Sanchez and J. Schmidt and D. Spong and D. Strickler and A. Subbotin and P. Valanju and R. White",

year = "2001",

month = may,

doi = "10.1063/1.1351826",

language = "English (US)",

volume = "8",

pages = "2083--2094",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics Publising LLC",

number = "5 II",

note = "42nd Annual Meeting of the APS Division of Plasma Physics ; Conference date: 23-10-2000 Through 27-10-2000",

}

Reiman, A, Ku, L, Monticello, D, Hirshman, S, Hudson, S, Kessel, C, Lazarus, E, Mikkelsen, D, Zarnstorff, M, Berry, LA, Boozer, A, Brooks, A, Cooper, WA, Drevlak, M, Fredrickson, E, Fu, G, Goldston, RJ, Hatcher, R, Isaev, M, Jun, C, Knowlton, S, Lewandowski, J, Lin, Z, Lyon, JF, Merkel, P, Mikhailov, M, Miner, W, Mynick, H, Neilson, G, Nelson, BE, Nührenberg, C, Pomphrey, N, Redi, M, Reiersen, W, Rutherford, P, Sanchez, R, Schmidt, J, Spong, D, Strickler, D, Subbotin, A, Valanju, P & White, R 2001, 'Recent advances in the design of quasiaxisymmetric stellarator plasma configurations', Physics of Plasmas, vol. 8, no. 5 II, pp. 2083-2094. https://doi.org/10.1063/1.1351826

TY - JOUR

T1 - Recent advances in the design of quasiaxisymmetric stellarator plasma configurations

AU - Reiman, A.

AU - Ku, L.

AU - Monticello, D.

AU - Hirshman, S.

AU - Hudson, S.

AU - Kessel, C.

AU - Lazarus, E.

AU - Mikkelsen, D.

AU - Zarnstorff, M.

AU - Berry, L. A.

AU - Boozer, A.

AU - Brooks, A.

AU - Cooper, W. A.

AU - Drevlak, M.

AU - Fredrickson, E.

AU - Fu, G.

AU - Goldston, Robert James

AU - Hatcher, R.

AU - Isaev, M.

AU - Jun, C.

AU - Knowlton, S.

AU - Lewandowski, J.

AU - Lin, Z.

AU - Lyon, J. F.

AU - Merkel, P.

AU - Mikhailov, M.

AU - Miner, W.

AU - Mynick, H.

AU - Neilson, G.

AU - Nelson, B. E.

AU - Nührenberg, C.

AU - Pomphrey, N.

AU - Redi, M.

AU - Reiersen, W.

AU - Rutherford, P.

AU - Sanchez, R.

AU - Schmidt, J.

AU - Spong, D.

AU - Strickler, D.

AU - Subbotin, A.

AU - Valanju, P.

AU - White, R.

PY - 2001/5

Y1 - 2001/5

N2 - Strategies for the improvement of quasiaxisymmetric stellarator configurations are explored. Calculations of equilibrium flux surfaces for candidate configurations are also presented. One optimization strategy is found to generate configurations with improved neoclassical confinement, simpler coils with lower current density, and improved flux surface quality relative to previous designs. The flux surface calculations find significant differences in the extent of islands and stochastic regions between candidate configurations. (These calculations do not incorporate the predicted beneficial effects of perturbed bootstrap currents.) A method is demonstrated for removing low order islands from candidate configurations by relatively small modifications of the configuration. One configuration is identified as having particularly desirable properties for a proposed experiment.

AB - Strategies for the improvement of quasiaxisymmetric stellarator configurations are explored. Calculations of equilibrium flux surfaces for candidate configurations are also presented. One optimization strategy is found to generate configurations with improved neoclassical confinement, simpler coils with lower current density, and improved flux surface quality relative to previous designs. The flux surface calculations find significant differences in the extent of islands and stochastic regions between candidate configurations. (These calculations do not incorporate the predicted beneficial effects of perturbed bootstrap currents.) A method is demonstrated for removing low order islands from candidate configurations by relatively small modifications of the configuration. One configuration is identified as having particularly desirable properties for a proposed experiment.

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UR - http://www.scopus.com/inward/citedby.url?scp=6644229132&partnerID=8YFLogxK

U2 - 10.1063/1.1351826

DO - 10.1063/1.1351826

M3 - Conference article

AN - SCOPUS:6644229132

SN - 1070-664X

VL - 8

SP - 2083

EP - 2094

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5 II

T2 - 42nd Annual Meeting of the APS Division of Plasma Physics

Y2 - 23 October 2000 through 27 October 2000

ER -

Recent advances in the design of quasiaxisymmetric stellarator plasma configurations

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