EFFECT OF QUADRUPOLE FIELDS ON LOCAL 3-DIMENSIONAL (3-D) IDEAL MAGNETOHYDRODYNAMIC (MHD) STABILITY IN TORSATRONS

Authors
MOECKLI R COOPER WA
Citation
R. Moeckli et Wa. Cooper, EFFECT OF QUADRUPOLE FIELDS ON LOCAL 3-DIMENSIONAL (3-D) IDEAL MAGNETOHYDRODYNAMIC (MHD) STABILITY IN TORSATRONS, Physics of plasmas, 1(3), 1994, pp. 793-795
Citations number
14
Categorie Soggetti
Phsycs, Fluid & Plasmas
Journal title
Physics of plasmas → ACNP
ISSN journal
1070664X
Volume
1
Issue
3
Year of publication
1994
Pages
793 - 795
Database
ISI
SICI code
1070-664X(1994)1:3<793:EOQFOL>2.0.ZU;2-W
Abstract
The local three-dimensional (3-D) ideal magnetohydrodynamic (MHD) stab ility properties of a 12-field period torsatron device of moderate asp ect ratio are investigated as a function of an externally applied quad rupole magnetic field. It is demonstrated that with a parabolic pressu re profile the volume-averaged beta limit due to the ballooning instab ilities decreases from beta congruent-to 2% to beta congruent-to 1.5% as the current I(mid) in the quadrupole field coils normalized to that in the main helical coils increases from 0 to 0.19.