Physics of compact stellarators

S. P. Hirshman; D. A. Spong; J. C. Whitson; B. Nelson; D. B. Batchelor; J. F. Lyon; R. Sanchez; A. Brooks; G. Y.-Fu; R. J. Goldston; L. P. Ku; D. A. Monticello; H. Mynick; G. H. Neilson; N. Pomphrey; M. Redi; W. Reiersen; A. H. Reiman; J. Schmidt; R. White; M. C. Zarnstorff; W. H. Miner; P. M. Valanju; A. Boozer

doi:10.1063/1.873489

Physics of compact stellarators

S. P. Hirshman, D. A. Spong, J. C. Whitson, B. Nelson, D. B. Batchelor, J. F. Lyon, R. Sanchez, A. Brooks, G. Y.-Fu, R. J. Goldston, L. P. Ku, D. A. Monticello, H. Mynick, G. H. Neilson, N. Pomphrey, M. Redi, W. Reiersen, A. H. Reiman, J. Schmidt, R. WhiteM. C. Zarnstorff, W. H. Miner, P. M. Valanju, A. Boozer

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Abstract

Recent progress in the theoretical understanding and design of compact stellarators is described. Hybrid devices, which depart from canonical stellarators by deriving benefits from the bootstrap current which flows at finite beta, comprise a class of low aspect ratio A<4 stellarators. They possess external kink stability (at moderate beta) in the absence of a conducting wall, possible immunity to disruptions through external control of the transform and magnetic shear, and they achieve volume-averaged ballooning beta limits (4%-6%) similar to those in tokamaks. In addition, bootstrap currents can reduce the effects of magnetic islands (self-healing effect) and lead to simpler stellarator coils by reducing the required external transform. Powerful physics and coil optimization codes have been developed and integrated to design experiments aimed at exploring compact stellarators. The physics basis for designing the national compact stellarator will be discussed.

Original language	English
Pages (from-to)	1858-1864
Number of pages	7
Journal	Physics of Plasmas
Volume	6
Issue number	5 I
DOIs	https://doi.org/10.1063/1.873489
State	Published - May 1999

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Hirshman, S. P., Spong, D. A., Whitson, J. C., Nelson, B., Batchelor, D. B., Lyon, J. F., Sanchez, R., Brooks, A., Y.-Fu, G., Goldston, R. J., Ku, L. P., Monticello, D. A., Mynick, H., Neilson, G. H., Pomphrey, N., Redi, M., Reiersen, W., Reiman, A. H., Schmidt, J., ... Boozer, A. (1999). Physics of compact stellarators. Physics of Plasmas, 6(5 I), 1858-1864. https://doi.org/10.1063/1.873489

@article{6c16e491d2794efb8857717e9ecf5702,

title = "Physics of compact stellarators",

abstract = "Recent progress in the theoretical understanding and design of compact stellarators is described. Hybrid devices, which depart from canonical stellarators by deriving benefits from the bootstrap current which flows at finite beta, comprise a class of low aspect ratio A<4 stellarators. They possess external kink stability (at moderate beta) in the absence of a conducting wall, possible immunity to disruptions through external control of the transform and magnetic shear, and they achieve volume-averaged ballooning beta limits (4%-6%) similar to those in tokamaks. In addition, bootstrap currents can reduce the effects of magnetic islands (self-healing effect) and lead to simpler stellarator coils by reducing the required external transform. Powerful physics and coil optimization codes have been developed and integrated to design experiments aimed at exploring compact stellarators. The physics basis for designing the national compact stellarator will be discussed.",

author = "Hirshman, {S. P.} and Spong, {D. A.} and Whitson, {J. C.} and B. Nelson and Batchelor, {D. B.} and Lyon, {J. F.} and R. Sanchez and A. Brooks and G. Y.-Fu and Goldston, {R. J.} and Ku, {L. P.} and Monticello, {D. A.} and H. Mynick and Neilson, {G. H.} and N. Pomphrey and M. Redi and W. Reiersen and Reiman, {A. H.} and J. Schmidt and R. White and Zarnstorff, {M. C.} and Miner, {W. H.} and Valanju, {P. M.} and A. Boozer",

year = "1999",

month = may,

doi = "10.1063/1.873489",

language = "English",

volume = "6",

pages = "1858--1864",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "5 I",

}

Hirshman, SP, Spong, DA, Whitson, JC, Nelson, B, Batchelor, DB, Lyon, JF, Sanchez, R, Brooks, A, Y.-Fu, G, Goldston, RJ, Ku, LP, Monticello, DA, Mynick, H, Neilson, GH, Pomphrey, N, Redi, M, Reiersen, W, Reiman, AH, Schmidt, J, White, R, Zarnstorff, MC, Miner, WH, Valanju, PM & Boozer, A 1999, 'Physics of compact stellarators', Physics of Plasmas, vol. 6, no. 5 I, pp. 1858-1864. https://doi.org/10.1063/1.873489

TY - JOUR

T1 - Physics of compact stellarators

AU - Hirshman, S. P.

AU - Spong, D. A.

AU - Whitson, J. C.

AU - Nelson, B.

AU - Batchelor, D. B.

AU - Lyon, J. F.

AU - Sanchez, R.

AU - Brooks, A.

AU - Y.-Fu, G.

AU - Goldston, R. J.

AU - Ku, L. P.

AU - Monticello, D. A.

AU - Mynick, H.

AU - Neilson, G. H.

AU - Pomphrey, N.

AU - Redi, M.

AU - Reiersen, W.

AU - Reiman, A. H.

AU - Schmidt, J.

AU - White, R.

AU - Zarnstorff, M. C.

AU - Miner, W. H.

AU - Valanju, P. M.

AU - Boozer, A.

PY - 1999/5

Y1 - 1999/5

N2 - Recent progress in the theoretical understanding and design of compact stellarators is described. Hybrid devices, which depart from canonical stellarators by deriving benefits from the bootstrap current which flows at finite beta, comprise a class of low aspect ratio A<4 stellarators. They possess external kink stability (at moderate beta) in the absence of a conducting wall, possible immunity to disruptions through external control of the transform and magnetic shear, and they achieve volume-averaged ballooning beta limits (4%-6%) similar to those in tokamaks. In addition, bootstrap currents can reduce the effects of magnetic islands (self-healing effect) and lead to simpler stellarator coils by reducing the required external transform. Powerful physics and coil optimization codes have been developed and integrated to design experiments aimed at exploring compact stellarators. The physics basis for designing the national compact stellarator will be discussed.

AB - Recent progress in the theoretical understanding and design of compact stellarators is described. Hybrid devices, which depart from canonical stellarators by deriving benefits from the bootstrap current which flows at finite beta, comprise a class of low aspect ratio A<4 stellarators. They possess external kink stability (at moderate beta) in the absence of a conducting wall, possible immunity to disruptions through external control of the transform and magnetic shear, and they achieve volume-averaged ballooning beta limits (4%-6%) similar to those in tokamaks. In addition, bootstrap currents can reduce the effects of magnetic islands (self-healing effect) and lead to simpler stellarator coils by reducing the required external transform. Powerful physics and coil optimization codes have been developed and integrated to design experiments aimed at exploring compact stellarators. The physics basis for designing the national compact stellarator will be discussed.

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VL - 6

SP - 1858

EP - 1864

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5 I

ER -

Physics of compact stellarators

Abstract

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