Existence of core localized toroidicity-induced Alfven eigenmode

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.871382· OSTI ID:6400473

Fu, G Y ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543 (United States)

The core-localized toroidicity-induced Alfven eigenmode (TAE) is shown to exist at finite plasma pressure due to finite aspect ratio effects in tokamak plasma. The new critical beta for the existence of the TAE mode is given by [alpha][approx]3[epsilon]+2[ital s][sup 2], where [epsilon]=[ital r]/[ital R] is the inverse aspect ratio, [ital s] is the magnetic shear and [alpha]=[minus][ital Rq][sup 2][ital d][beta]/[ital dr] is the normalized pressure gradient. In contrast, previous critical [alpha] is given by [alpha][approx][ital s][sup 2]. In the limit of [ital s][much lt][radical][ital r]/[ital R], the new critical [alpha] is greatly enhanced by the finite aspect ratio effects.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6400473
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 2:4; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
ALFVEN WAVES
ASPECT RATIO
BALLOONING INSTABILITY
CLOSED PLASMA DEVICES
HYDROMAGNETIC WAVES
INSTABILITY
LOW-BETA PLASMA
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA PRESSURE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES