Stabilization of magnetohydrodynamic modes by applied radiofrequency waves

Technical Report · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6002739

D'Ippolito, D A; Myra, J R

A kinetic theory describing the nonlinear interaction of radiofrequency waves with low frequency magnetohydrodynamic modes is presented. The calculation of the nonlinear force density on a fluid element includes both ponderomotive and sideband mode coupling terms and allows arbitrary rf wave polarization. Electromagnetic effects and wave-particle interactions are retained in the analysis. The influence of the nonlinear force on magnetohydrodynamic plasma stability is calculated self-consistently, and a generalized low mode number ballooning equation is obtained for paraxial magnetic mirror geometry. The low frequency stability problem is thereby shown to involve the coupling of four waves and the system of governing equations is presented. Specialized limits of the general equations are discussed, and a physical interpretation of rf stabilization is given. It is shown that stability is enhanced by placing the antenna and conducting cavity walls close to the plasma surface.

• Research Organization: Science Applications International Corp., Boulder, CO (USA). Plasma Research Inst.
• DOE Contract Number: AC03-76ET53057
• OSTI ID: 6002739
• Report Number(s): SAIC-85/1922; PRI-94; ON: DE86008564
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
ANTENNAS
BALLOONING INSTABILITY
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
EQUATIONS
EQUIPMENT
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
KINETIC EQUATIONS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC MIRROR CONFIGURATIONS
MAGNETIC MIRRORS
MAGNETOHYDRODYNAMICS
MECHANICS
NONLINEAR PROBLEMS
OPEN CONFIGURATIONS
OPEN PLASMA DEVICES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA WAVES
RADIATIONS
RADIOWAVE RADIATION
STABILIZATION
TANDEM MIRRORS
THERMONUCLEAR DEVICES