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Title:
Quadrupole Stabilization of the n=2 Rotational Instability of a Field-Reversed Theta-Pinch Plasma
Authors:
Ohi, S.; Minato, T.; Kawakami, Y.; Tanjyo, M.; Okada, S.; Ito, Y.; Kako, M.; Gotô, S.; Ishimura, T.; Itô, H.
Affiliation:
AA(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AB(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AC(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AD(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AE(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AF(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AG(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AH(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AI(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan), AJ(Plasma Physics Laboratory, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan)
Publication:
Physical Review Letters, Volume 51, Issue 12, September 19, 1983, pp.1042-1045 (PhRvL Homepage)
Publication Date:
09/1983
Origin:
AIP; APS
PACS Keywords:
Theta pinch, Waves oscillations and instabilities in plasmas and intense beams
DOI:
10.1103/PhysRevLett.51.1042
Bibliographic Code:
1983PhRvL..51.1042O

Abstract

The n=2 rotational instability is the most dangerous gross instability in a field-reversed theta pinch. It is demonstrated for the first time that the instability is completely suppressed by superposing a quadrupole field which is much smaller than the axial confinement field at the separatrix. The experimental threshold intensity of the field for stabilization is about 2.5 times less than that predicted by theoretical stability analysis.
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