Stable confinement of a high-beta toroidal plasma

S. C. Prager; J. H. Halle; M. W. Phillips; R. S. Post; J. C. Twichell

doi:10.1088/0029-5515/20/5/013

Stable confinement of a high-beta toroidal plasma

S. C. Prager, J. H. Halle, M. W. Phillips, R. S. Post, J. C. Twichell

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

A plasma with β ≈ 12% has been stably confined in the Levitated Octupole. Although the single-fluid ballooning-instability beta limit is exceeded on the outer flux surfaces, no such mode is observed. Finite-ion-gyroradius effects may account for the observed stability. The single-fluid calculation indicates that the amplitude of the most unstable mode is nearly uniform along the magnetic field line with only slight peaking in the bad-curvature region. The particle confinement time is one quarter of the classical value.

Original language	English (US)
Pages (from-to)	635-638
Number of pages	4
Journal	Nuclear Fusion
Volume	20
Issue number	5
DOIs	https://doi.org/10.1088/0029-5515/20/5/013
State	Published - May 1980

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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abstract = "A plasma with β ≈ 12% has been stably confined in the Levitated Octupole. Although the single-fluid ballooning-instability beta limit is exceeded on the outer flux surfaces, no such mode is observed. Finite-ion-gyroradius effects may account for the observed stability. The single-fluid calculation indicates that the amplitude of the most unstable mode is nearly uniform along the magnetic field line with only slight peaking in the bad-curvature region. The particle confinement time is one quarter of the classical value.",

author = "Prager, {S. C.} and Halle, {J. H.} and Phillips, {M. W.} and Post, {R. S.} and Twichell, {J. C.}",

year = "1980",

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language = "English (US)",

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T1 - Stable confinement of a high-beta toroidal plasma

AU - Prager, S. C.

AU - Halle, J. H.

AU - Phillips, M. W.

AU - Post, R. S.

AU - Twichell, J. C.

PY - 1980/5

Y1 - 1980/5

N2 - A plasma with β ≈ 12% has been stably confined in the Levitated Octupole. Although the single-fluid ballooning-instability beta limit is exceeded on the outer flux surfaces, no such mode is observed. Finite-ion-gyroradius effects may account for the observed stability. The single-fluid calculation indicates that the amplitude of the most unstable mode is nearly uniform along the magnetic field line with only slight peaking in the bad-curvature region. The particle confinement time is one quarter of the classical value.

AB - A plasma with β ≈ 12% has been stably confined in the Levitated Octupole. Although the single-fluid ballooning-instability beta limit is exceeded on the outer flux surfaces, no such mode is observed. Finite-ion-gyroradius effects may account for the observed stability. The single-fluid calculation indicates that the amplitude of the most unstable mode is nearly uniform along the magnetic field line with only slight peaking in the bad-curvature region. The particle confinement time is one quarter of the classical value.

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VL - 20

SP - 635

EP - 638

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 5

ER -

Stable confinement of a high-beta toroidal plasma

Abstract

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