Kinetic and fluid ballooning stability in anisotropic ion tokamaks
The derivation of a kinetic ballooning mode equation for multiple anisotropic fluid ion plasmas and Maxwellian adiabatic electrons is presented. Considering the magnetohydrodynamic (MHD) limit, a fluid ballooning mode equation similar to that derived from the Kruskal--Oberman energy principle is obtained, except that the energetic ions do not contribute to the instability driving mechanism because they drift across the destabilizing curvature region at a rate that is faster than the oscillation of the mode. A numerical example shows that the Kruskal--Oberman critical beta ..beta../sub c/ approx. =2.65% can be increased to ..beta../sub c/ approx. =4.1% when the ratio of peak energetic ion beta to peak total beta ..beta../sub h/0/..beta../sub 0/ = 0.3. Finite Larmor radius (FLR) corrections are also evaluated.
- Research Organization:
- Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5890251
- Journal Information:
- Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 26:7; ISSN PFLDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ADIABATIC PROCESSES
ANISOTROPY
BALLOONING INSTABILITY
BOLTZMANN STATISTICS
CHARGED PARTICLES
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
IONS
LEPTONS
MAGNETOHYDRODYNAMICS
MECHANICS
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES