Observations of high-beta toroidal plasmas

J. H. Halle; A. G. Kellman; R. S. Post; S. C. Prager; E. J. Strait; M. C. Zarnstorff

doi:10.1103/PhysRevLett.46.1394

Observations of high-beta toroidal plasmas

J. H. Halle, A. G. Kellman, R. S. Post, S. C. Prager, E. J. Strait, M. C. Zarnstorff

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11 Scopus citations

Abstract

A wide range of magnetohydrodynamically stable high-β plasmas is produced in the University of Wisconsin Levitated Toroidal Octupole. Near the single-fluid regime we obtain, in the bad-curvature region, β=nk(Te+Ti)8πB28%, twice the theoretical single-fluid ballooning instability limit of 4%. We also obtain stable plasmas at β=35%, nine times the theoretical limit, in a regime in which finite-ion-gyroradius (e.g., gyroviscosity) effects are important. Experimental spatial profiles of the equilibrium diamagnetism are compared with theory.

Original language	English (US)
Pages (from-to)	1394-1397
Number of pages	4
Journal	Physical review letters
Volume	46
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.46.1394
State	Published - 1981

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.46.1394

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abstract = "A wide range of magnetohydrodynamically stable high-β plasmas is produced in the University of Wisconsin Levitated Toroidal Octupole. Near the single-fluid regime we obtain, in the bad-curvature region, β=nk(Te+Ti)8πB28%, twice the theoretical single-fluid ballooning instability limit of 4%. We also obtain stable plasmas at β=35%, nine times the theoretical limit, in a regime in which finite-ion-gyroradius (e.g., gyroviscosity) effects are important. Experimental spatial profiles of the equilibrium diamagnetism are compared with theory.",

author = "Halle, {J. H.} and Kellman, {A. G.} and Post, {R. S.} and Prager, {S. C.} and Strait, {E. J.} and Zarnstorff, {M. C.}",

year = "1981",

doi = "10.1103/PhysRevLett.46.1394",

language = "English (US)",

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T1 - Observations of high-beta toroidal plasmas

AU - Halle, J. H.

AU - Kellman, A. G.

AU - Post, R. S.

AU - Prager, S. C.

AU - Strait, E. J.

AU - Zarnstorff, M. C.

PY - 1981

Y1 - 1981

N2 - A wide range of magnetohydrodynamically stable high-β plasmas is produced in the University of Wisconsin Levitated Toroidal Octupole. Near the single-fluid regime we obtain, in the bad-curvature region, β=nk(Te+Ti)8πB28%, twice the theoretical single-fluid ballooning instability limit of 4%. We also obtain stable plasmas at β=35%, nine times the theoretical limit, in a regime in which finite-ion-gyroradius (e.g., gyroviscosity) effects are important. Experimental spatial profiles of the equilibrium diamagnetism are compared with theory.

AB - A wide range of magnetohydrodynamically stable high-β plasmas is produced in the University of Wisconsin Levitated Toroidal Octupole. Near the single-fluid regime we obtain, in the bad-curvature region, β=nk(Te+Ti)8πB28%, twice the theoretical single-fluid ballooning instability limit of 4%. We also obtain stable plasmas at β=35%, nine times the theoretical limit, in a regime in which finite-ion-gyroradius (e.g., gyroviscosity) effects are important. Experimental spatial profiles of the equilibrium diamagnetism are compared with theory.

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Observations of high-beta toroidal plasmas

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