Kinetic effects in Alfven wave heating. Part I: Surface eigenmodes in a pure plasma

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Physics of Fluids B: Plasma Physics; (USA)

DOI:https://doi.org/10.1063/1.859055· OSTI ID:5175337

Li, W; Ross, D W; Mahajan, S M ^[1]

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1. Fusion Research Center, The University of Texas at Austin, Austin, Texas 78712 (US)

Kinetic effects of Alfven wave spatial resonances near the plasma edge are investigated numerically and analytically in a linearized cylindrical tokamak model. In Part I, cold plasma surface Alfven eigenmodes (SAE's) in a pure plasma are examined. Numerical calculations of antenna-driven waves exhibiting absorption resonances at certain discrete frequencies are reviewed first. From a simplified kinetic equation, an analytical dispersion relation is then obtained with the antenna current set equal to zero. The real and imaginary parts of its roots, which are the complex eigenfrequencies, agree with the central frequencies and widths, respectively, of the numerical antenna-driven resonances. These results serve as an introduction to the companion paper, Part II (Phys. Fluids B {bold 1}, 2364 (1989)), in which it is shown that, in the presence of a minority species, certain SAE's, instead of heating the plasma exterior, can dissipate substantial energy in the two-ion hybrid layer near the plasma center.

• OSTI ID: 5175337
• Journal Information: Physics of Fluids B: Plasma Physics; (USA), Journal Name: Physics of Fluids B: Plasma Physics; (USA) Vol. 1:12; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ABSORPTION
ALFVEN WAVES
ANALYTICAL SOLUTION
ANTENNAS
COLD PLASMA
COLLISIONAL PLASMA
CONFIGURATION
CYLINDRICAL CONFIGURATION
DISPERSION RELATIONS
DOCUMENT TYPES
EIGENVALUES
ELECTRICAL EQUIPMENT
EQUATIONS
EQUIPMENT
HEATING
HYDROMAGNETIC WAVES
IMPURITIES
INHOMOGENEOUS PLASMA
KINETIC EQUATIONS
NUMERICAL SOLUTION
PLASMA
PLASMA HEATING
RESONANCE ABSORPTION
REVIEWS
SURFACES
WKB APPROXIMATION