Numerical study of drift-resistive modes in general toroidal geometry

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.866543· OSTI ID:6966485

Kim, J; Cho, G; Choi, D

The linearized resistive boundary layer equations, including electron diamagnetic drift terms in general toroidal geometry, are solved numerically to obtain the dispersion relations of the resistive ballooning modes as well as the resistive interchange and tearing modes in both highly collisional and semicollisional regimes. Numerical solutions with high accuracy are obtained using two different numerical methods. Various physical effects, such as electron diamagnetic drift, parallel and perpendicular compression, and average curvature, are investigated in a wide range of equilibrium parameters. The present work is believed to be the first numerical study of the resistive ballooning modes with finite electron diamagnetic drift effects. These numerical solutions cover a wider range of parameter spaces than thus far available from analytical and other numerical methods. The new solutions contain previously known results as special cases. From the present study it is found that for the resistive ballooning and tearing modes, which have similar forms of dispersion relation, ion sound compression gives a substantial stabilizing effect, while ion-polarization compression gives a destabilizing effect and the stabilizing effect of favorable average curvature is significantly reduced as the diamagnetic drift effect increases. For the resistive interchange modes, these numerical results are shown to be in good agreement with previous results.

• Research Organization: Department of Physics, Korea Advanced Institute of Science and Technology, P. O. Box 150, Cheongyangni, Seoul, Korea
• OSTI ID: 6966485
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 31:9; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107 -- Fusion Energy-- Plasma Research-- Instabilities
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ANNULAR SPACE
BALLOONING INSTABILITY
BOUNDARY LAYERS
COLLISIONAL PLASMA
CONFIGURATION
DIAMAGNETISM
DISPERSION RELATIONS
ELECTRON DRIFT
EQUATIONS
EQUILIBRIUM
FLUTE INSTABILITY
INSTABILITY
LAYERS
MAGNETISM
NUMERICAL SOLUTION
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SPACE
TEARING INSTABILITY
TOROIDAL CONFIGURATION