Computational study of ion cyclotron frequency stabilization of the m = 1 interchange mode in mirror geometry
A cylindrical plasma model is used to study the stabilizing effect of electromagnetic ion cyclotron frequency range (ICRF) waves on the m = 1 magnetohydrodynamic interchange mode. The fast wave eigenmodes of the column and the near-field antenna pattern are calculated numerically for a diffuse plasma profile when ..omega..>..cap omega../sub i/. The resulting ponderomotive force and sideband contributions to global interchange stability are then determined using a rigid shift trial function. For far-field stabilization it is verified that the direct ponderomotive and sideband contributions cancel exactly as the conducting wall supporting the fast wave eigenmode moves out to infinity. The near-field stabilization effect is related numerically to the driven k/sub parallel/ spectrum of the waves and their radial profiles. The numerical model is employed to calculate threshold ICRF wave amplitudes for the stabilization experiments in the Phaedrus tandem mirror (Phys. Rev. Lett. 51, 1955 (1983)).
- Research Organization:
- Science Applications International Corporation, Plasma Research Institute, 1515 Walnut Street, Boulder, Colorado 80302
- OSTI ID:
- 6680413
- Journal Information:
- Phys. Fluids; (United States), Vol. 30:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FLUTE INSTABILITY
STABILIZATION
PLASMA
ANTENNAS
PLASMA SIMULATION
TANDEM MIRRORS
PLASMA INSTABILITY
AMPLITUDES
CYCLOTRON FREQUENCY
CYLINDRICAL CONFIGURATION
ELECTRIC POTENTIAL
ELECTROMAGNETIC RADIATION
FUNCTIONS
MAGNETOHYDRODYNAMICS
NUMERICAL SOLUTION
RF SYSTEMS
THRESHOLD ENERGY
CONFIGURATION
ELECTRICAL EQUIPMENT
ENERGY
EQUIPMENT
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
MAGNETIC MIRRORS
MECHANICS
OPEN PLASMA DEVICES
PLASMA MACROINSTABILITIES
RADIATIONS
SIMULATION
THERMONUCLEAR DEVICES
700107* - Fusion Energy- Plasma Research- Instabilities
700108 - Fusion Energy- Plasma Research- Wave Phenomena