Ponderomotive force in the presence of electric fields

G. V. Khazanov, E. N. Krivorutsky
2013 Physics of Plasmas  
Electron and ion kinetic effects on non-linearly driven electron plasma and ion acoustic waves Phys. Plasmas 20, 032107 (2013) Nonlinear interaction of kinetic Alfvén wave with fast magnetosonic wave and turbulent spectrum Phys. Plasmas 20, 032303 (2013) Additional information on Phys. Plasmas This paper presents averaged equations of particle motion in an electromagnetic wave of arbitrary frequency with its wave vector directed along the ambient magnetic field. The particle is also subjected
more » ... is also subjected to anẼ ÂB drift and a background electric field slowly changing in space and acting along the magnetic field line. The fields, wave amplitude, and the wave vector depend on the coordinate along the magnetic field line. The derivations of the ponderomotive forces are done by assuming that the drift velocity in the ambient magnetic field is comparable to the particle velocity. Such a scenario leads to new ponderomotive forces, dependent on the wave magnetic field intensity, and, as a result, to the additional energy exchange between the wave and the plasma particles. It is found that the parallel electric field can lead to the change of the particle-wave energy exchange rate comparable to that produced by the previously discussed ponderomotive forces. [http://dx.
doi:10.1063/1.4789874 fatcat:k42ffggqxjfl3ihzm6m35lzn2y