Second ballooning stability in high-β, compact stellarators

A. S. Ware; D. Westerly; E. Barcikowski; L. A. Berry; G. Y. Fu; S. P. Hirshman; J. F. Lyon; R. Sanchez; D. A. Spong; D. J. Strickler

doi:10.1063/1.1651101

Second ballooning stability in high-β, compact stellarators

A. S. Ware, D. Westerly, E. Barcikowski, L. A. Berry, G. Y. Fu, S. P. Hirshman, J. F. Lyon, R. Sanchez, D. A. Spong, D. J. Strickler

Physics and Astronomy

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2 Scopus citations

Abstract

The phenomena of second ballooning stability in quasipoloidally symmetric, compact stellarator configurations was investigated. The high-β free-boundary equilibria was calculated using a reference Quasi-Poloidal Stellarator (QPS) configuration. It was observed that QPS equilibria possess regions of second stability at high β. It was found that the QPS plasmas with Ohmic current profiles have both a lower infinite-n ballooning β-limit for the onset of first instability and a higher β-limit for the onset of second stability relative to QPS plasma with bootstrap current profiles.

Original language	English
Pages (from-to)	2453-2458
Number of pages	6
Journal	Physics of Plasmas
Volume	11
Issue number	5 PART 2
DOIs	https://doi.org/10.1063/1.1651101
State	Published - May 2004

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title = "Second ballooning stability in high-β, compact stellarators",

abstract = "The phenomena of second ballooning stability in quasipoloidally symmetric, compact stellarator configurations was investigated. The high-β free-boundary equilibria was calculated using a reference Quasi-Poloidal Stellarator (QPS) configuration. It was observed that QPS equilibria possess regions of second stability at high β. It was found that the QPS plasmas with Ohmic current profiles have both a lower infinite-n ballooning β-limit for the onset of first instability and a higher β-limit for the onset of second stability relative to QPS plasma with bootstrap current profiles.",

author = "Ware, {A. S.} and D. Westerly and E. Barcikowski and Berry, {L. A.} and Fu, {G. Y.} and Hirshman, {S. P.} and Lyon, {J. F.} and R. Sanchez and Spong, {D. A.} and Strickler, {D. J.}",

year = "2004",

month = may,

doi = "10.1063/1.1651101",

language = "English",

volume = "11",

pages = "2453--2458",

journal = "Physics of Plasmas",

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publisher = "American Institute of Physics",

number = "5 PART 2",

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TY - JOUR

T1 - Second ballooning stability in high-β, compact stellarators

AU - Ware, A. S.

AU - Westerly, D.

AU - Barcikowski, E.

AU - Berry, L. A.

AU - Fu, G. Y.

AU - Hirshman, S. P.

AU - Lyon, J. F.

AU - Sanchez, R.

AU - Spong, D. A.

AU - Strickler, D. J.

PY - 2004/5

Y1 - 2004/5

N2 - The phenomena of second ballooning stability in quasipoloidally symmetric, compact stellarator configurations was investigated. The high-β free-boundary equilibria was calculated using a reference Quasi-Poloidal Stellarator (QPS) configuration. It was observed that QPS equilibria possess regions of second stability at high β. It was found that the QPS plasmas with Ohmic current profiles have both a lower infinite-n ballooning β-limit for the onset of first instability and a higher β-limit for the onset of second stability relative to QPS plasma with bootstrap current profiles.

AB - The phenomena of second ballooning stability in quasipoloidally symmetric, compact stellarator configurations was investigated. The high-β free-boundary equilibria was calculated using a reference Quasi-Poloidal Stellarator (QPS) configuration. It was observed that QPS equilibria possess regions of second stability at high β. It was found that the QPS plasmas with Ohmic current profiles have both a lower infinite-n ballooning β-limit for the onset of first instability and a higher β-limit for the onset of second stability relative to QPS plasma with bootstrap current profiles.

UR - http://www.scopus.com/inward/record.url?scp=2942542959&partnerID=8YFLogxK

U2 - 10.1063/1.1651101

DO - 10.1063/1.1651101

M3 - Article

AN - SCOPUS:2942542959

SN - 1070-664X

VL - 11

SP - 2453

EP - 2458

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5 PART 2

ER -

Second ballooning stability in high-β, compact stellarators

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