Effect of the drift wave turbulence on the evolution of the low-[ital m] tearing modes

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870559· OSTI ID:6692942

Siva Rama Prasad, P V; Tewari, D P ^[1]

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1. Department of Physics, Indian Institute of Technology, Delhi, New Delhi-110 016 (India)

The effect of the background drift wave turbulence on the evolution of the low-[ital m] tearing modes has been studied, in the quasilinear regime, in various limiting cases. It is found, in the cases of the [ital m]=1 classical, collisionless, and drift-tearing modes, that the turbulence introduces finite real frequencies to these modes, which are otherwise purely growing ones, but reduces their instability activity. In the case of the [ital m][ge]2 classical modes, in a limit [vert bar][alpha][vert bar][sup 1/2][much gt][rho][sub [ital i]], the turbulence enhances the frequencies as well as the growth rates of these modes; and in the case of the [ital m][ge]2 collisionless modes, in the same limit, it enhances the frequencies of these modes, but reduces their instability activity, where [vert bar][alpha][vert bar][sup 1/2] is the current channel width and [rho][sub [ital i]] is the ion Larmor radius.

• OSTI ID: 6692942
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:1; 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-)
CLOSED PLASMA DEVICES
CURRENT DENSITY
DRIFT INSTABILITY
ENERGY
FREE ENERGY
INSTABILITY
INSTABILITY GROWTH RATES
LARMOR RADIUS
PHYSICAL PROPERTIES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
TEARING INSTABILITY
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE