Dispersive Alfvén Waves in the Laboratory and Space

Comment on 'Role of dispersive Alfvén waves in generating parallel electric fields

Harmonic generation of gravitational wave induced Alfvén waves

Here we consider the nonlinear evolution of Alfvén waves that have been excited by gravitational waves from merging binary pulsars. We derive a wave equation for strongly nonlinear and dispersive Alfvén waves. Due to the weak dispersion of the Alfvén waves, significant wave steepening can occur, which in turn implies strong harmonic generation. We find that the harmonic generation is saturated ...

Solar coronal electron heating by short-wavelength dispersive shear Alfvén waves

The electron heating of the solar coronal plasma has remained one of the most important problems in solar physics. An explanation of the electron heating rests on the identification of the energy source and appropriate physical mechanisms via which the energy can be channelled to the electrons. Our objective here is to present an estimate for the electron heating rate in the presence of finite ...

Landau-fluid simulations of Alfvén-wave instabilities in a warm collisionless plasma

A dispersive Landau-fluid model is used to study the decay and modulational instabilities of circularlypolarized Alfvén waves in a collisionless plasma, as well as their nonlinear developments. Comparisons are presented with the drift-kinetic approximation for the dispersionless regime and with hybrid simulations in more general conditions. The effect of the nature of the instability on particl...

Simulation of Shear Alfvén Waves in LAPD using the BOUT++ code

The linear and nonlinear physics of shear Alfvén waves are investigated using the 3D Braginskii fluid code BOUT++. The code has been verified against analytical calculations for the dispersion of kinetic and inertial Alfvén waves. Various mechanisms for forcing Alfvén waves in the code are explored, including introducing localized current sources similar to physical antennas used in experiments...