Resonant and nonresonant whistlers-particle interaction in the radiation belts

Resonant and nonresonant whistlers-particle interaction in the radiation belts

We study the wave-particle interactions between lower band chorus whistlers and an anisotropic tenuous population of relativistic electrons. We present the first direct comparison of first-principle particle-in-cell (PIC) simulations with a quasi-linear diffusion code. In the PIC approach, the waves are self-consistently generated by the temperature anisotropy instability that quickly saturates...

Relativistic surfatron process for Landau resonant electrons in radiation belts

Recent theoretical studies of the nonlinear waveparticle interactions for relativistic particles have shown that Landau resonant orbits could be efficiently accelerated along the mean background magnetic field for propagation angles θ in close proximity to a critical propagation θc associated with a Hopf–Hopf bifurcation condition. In this report, we extend previous studies to reach greater mod...

Resonant and nonresonant patterns in forced oscillators.

Uniform oscillations in spatially extended systems resonate with temporal periodic forcing within the Arnold tongues of single forced oscillators. The Arnold tongues are wedge-like domains in the parameter space spanned by the forcing amplitude and frequency, within which the oscillator's frequency is locked to a fraction of the forcing frequency. Spatial patterning can modify these domains. We...

Resonant Wave-Particle Interaction in Nonuniform Plasmas

The appearance of resonant-particle effects in the linear dynamics of electron waves in a plasma whose electrons are trapped in a potential trough is discussed and conditions for the characteristic times involved are derived. For the special case of a parabolic potential trough it is shown that, within a limited time interval, a strong resonant effect may occur, due to the interaction of a wave...

Resonant and Nonresonant Interactions in Cold Quantum Gases