Parametric decay of plasma waves near the upper-hybrid resonance

Abstract

An intense X wave propagating perpendicularly to dc magnetic field is unstable with respect to a parametric decay into an electron Bernstein wave and a lower-hybrid wave. A modified theory of this effect is proposed that extends to the high-intensity regime, where the instability rate $\gamma$ ceases to be a linear function of the incident-wave amplitude. An explicit formula for $\gamma$ is derived and expressed in terms of cold-plasma parameters. Theory predictions are in reasonable agreement with the results of the particle-in-cell simulations presented in a separate publication.

References in corpus (9)

• A survey of electron Bernstein wave heating and current drive potential for spherical tokamaks
• Zonal-flow dynamics from a phase-space perspective
• Extending geometrical optics: A Lagrangian theory for vector waves
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• Ponderomotive dynamics of waves in quasiperiodically modulated media
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Cited by in corpus (4)

• Laser-plasma interaction in magnetized environment
• Three-wave scattering in magnetized plasmas: from cold fluid to quantized Lagrangian
• Three-wave interactions in magnetized warm-fluid plasmas: general theory with evaluable coupling coefficient
• Kinetic simulations of X-B and O-X-B mode conversion and its deterioration at high input power