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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@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 - http://www.scopus.com/inward/record.url?scp=0030074181&partnerID=8YFLogxK

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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