Ultra low aspect ratio stellarator or hybrid configurations

P. E. Moroz; D. B. Batchelor; B. A. Carreras; S. P. Hirshman; D. K. Lee; V. E. Lynch; D. A. Spong; J. S. Tolliver; A. S. Ware; J. C. Whitson

doi:10.13182/fst96-a11963136

Ultra low aspect ratio stellarator or hybrid configurations

P. E. Moroz
, D. B. Batchelor
, B. A. Carreras
, S. P. Hirshman
, D. K. Lee
, V. E. Lynch
, D. A. Spong
, J. S. Tolliver
, A. S. Ware
, J. C. Whitson

Research output: Contribution to journal › Conference article › peer-review

9 Scopus citations

Abstract

Novel concepts of an ultra-low-aspect-ratio stellarator system, called a Spherical Stellarator (SS), or a stellarator-tokamak hybrid system, called SMARTH (Small Aspect Ratio Toroidal Hybrid) are discussed for high-β regimes of operation. Self-consistent analysis of the three-dimensional MHD equilibria with inductively driven plasma current or bootstrap current is presented. It is stressed that the bootstrap current in SS can be large and is flowing in such a direction that the rotational transform produced enhances the vacuum rotational transform. This feature increases the equilibrium β-limit. The high-β equilibria in SS and SMARTH (β(0) > 30%, β̄ ≈ 8-9%) are demonstrated, correspondingly, with the bootstrap current and the ohmic current. Possible experiments and scalings, including those for reactor parameters, are outlined.

Original language	English
Pages (from-to)	1347-1354
Number of pages	8
Journal	Unknown Journal
Volume	30
Issue number	3
DOIs	https://doi.org/10.13182/fst96-a11963136
State	Published - 1996
Externally published	Yes
Event	Proceedings of the 1996 12th Topical Meeting on the Technology of Fusion Energy. Part 2 (of 2) - Reno, NV, USA Duration: Jun 16 1996 → Jun 20 1996

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10.13182/fst96-a11963136

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@article{110961caa4b746488aa0ec47ea78910d,

title = "Ultra low aspect ratio stellarator or hybrid configurations",

abstract = "Novel concepts of an ultra-low-aspect-ratio stellarator system, called a Spherical Stellarator (SS), or a stellarator-tokamak hybrid system, called SMARTH (Small Aspect Ratio Toroidal Hybrid) are discussed for high-β regimes of operation. Self-consistent analysis of the three-dimensional MHD equilibria with inductively driven plasma current or bootstrap current is presented. It is stressed that the bootstrap current in SS can be large and is flowing in such a direction that the rotational transform produced enhances the vacuum rotational transform. This feature increases the equilibrium β-limit. The high-β equilibria in SS and SMARTH (β(0) > 30\%, {\=β} ≈ 8-9\%) are demonstrated, correspondingly, with the bootstrap current and the ohmic current. Possible experiments and scalings, including those for reactor parameters, are outlined.",

author = "Moroz, \{P. E.\} and Batchelor, \{D. B.\} and Carreras, \{B. A.\} and Hirshman, \{S. P.\} and Lee, \{D. K.\} and Lynch, \{V. E.\} and Spong, \{D. A.\} and Tolliver, \{J. S.\} and Ware, \{A. S.\} and Whitson, \{J. C.\}",

year = "1996",

doi = "10.13182/fst96-a11963136",

language = "English",

volume = "30",

pages = "1347--1354",

journal = "Unknown Journal",

number = "3",

note = "Proceedings of the 1996 12th Topical Meeting on the Technology of Fusion Energy. Part 2 (of 2) ; Conference date: 16-06-1996 Through 20-06-1996",

}

TY - JOUR

T1 - Ultra low aspect ratio stellarator or hybrid configurations

AU - Moroz, P. E.

AU - Batchelor, D. B.

AU - Carreras, B. A.

AU - Hirshman, S. P.

AU - Lee, D. K.

AU - Lynch, V. E.

AU - Spong, D. A.

AU - Tolliver, J. S.

AU - Ware, A. S.

AU - Whitson, J. C.

PY - 1996

Y1 - 1996

N2 - Novel concepts of an ultra-low-aspect-ratio stellarator system, called a Spherical Stellarator (SS), or a stellarator-tokamak hybrid system, called SMARTH (Small Aspect Ratio Toroidal Hybrid) are discussed for high-β regimes of operation. Self-consistent analysis of the three-dimensional MHD equilibria with inductively driven plasma current or bootstrap current is presented. It is stressed that the bootstrap current in SS can be large and is flowing in such a direction that the rotational transform produced enhances the vacuum rotational transform. This feature increases the equilibrium β-limit. The high-β equilibria in SS and SMARTH (β(0) > 30%, β̄ ≈ 8-9%) are demonstrated, correspondingly, with the bootstrap current and the ohmic current. Possible experiments and scalings, including those for reactor parameters, are outlined.

AB - Novel concepts of an ultra-low-aspect-ratio stellarator system, called a Spherical Stellarator (SS), or a stellarator-tokamak hybrid system, called SMARTH (Small Aspect Ratio Toroidal Hybrid) are discussed for high-β regimes of operation. Self-consistent analysis of the three-dimensional MHD equilibria with inductively driven plasma current or bootstrap current is presented. It is stressed that the bootstrap current in SS can be large and is flowing in such a direction that the rotational transform produced enhances the vacuum rotational transform. This feature increases the equilibrium β-limit. The high-β equilibria in SS and SMARTH (β(0) > 30%, β̄ ≈ 8-9%) are demonstrated, correspondingly, with the bootstrap current and the ohmic current. Possible experiments and scalings, including those for reactor parameters, are outlined.

UR - https://www.scopus.com/pages/publications/0030074181

U2 - 10.13182/fst96-a11963136

DO - 10.13182/fst96-a11963136

M3 - Conference article

AN - SCOPUS:0030074181

VL - 30

SP - 1347

EP - 1354

JO - Unknown Journal

JF - Unknown Journal

IS - 3

T2 - Proceedings of the 1996 12th Topical Meeting on the Technology of Fusion Energy. Part 2 (of 2)

Y2 - 16 June 1996 through 20 June 1996

ER -

Ultra low aspect ratio stellarator or hybrid configurations

Abstract

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