Kinetic resonance damping rate of the toroidal ion temperature gradient mode

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

DOI:https://doi.org/10.1063/1.870751· OSTI ID:5211908

Kim, J Y; Kishimoto, Y; Horton, W; Tajima, T ^[1]

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1. Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)

The linear damping rates of the toroidal ion temperature gradient ([eta][sub [ital i]]) mode due to the toroidal resonance are calculated in the local kinetic limit. The well-known Landau contour method is generalized to treat the analytic continuation problem of the guiding center dispersion function in the toroidal resonance system where the resonance occurs from both the magnetic [del][ital B]-curvature drift and the parallel ion transit drift. A detailed numerical analysis is presented for the dependence of the damping rate of the toroidal [eta][sub [ital i]] mode on various parameters such as [epsilon][sub [ital n]], [ital k][sub [ital y]], and the trapped electron fraction. In addition, a consideration is presented on the decay problem of the ballistic response by phase mixing in the toroidal system, which is directly related to the kinetic damping problem of the normal modes by the toroidal resonance.

• DOE Contract Number: FG05-80ET53088
• OSTI ID: 5211908
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:4; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330 -- Plasma Kinetics
Transport
& Impurities-- (1992-)
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
ANNULAR SPACE
BALLOONING INSTABILITY
CLOSED CONFIGURATIONS
CONFIGURATION
DAMPING
DISPERSION RELATIONS
INSTABILITY
ION TEMPERATURE
MAGNETIC FIELD CONFIGURATIONS
NUMERICAL SOLUTION
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
RESONANCE
SPACE
TEMPERATURE GRADIENTS
TOROIDAL CONFIGURATION