Kinetic effects with regard to a one dimensional Langmuir soliton-like pulse
are investigated. Though thus far mainly transit-time accelerations have been
investigated regarding strong Langmuir turbulence, it is found that
ponderomotive reflections (generalized nonlinear Landau damping) may play
important roles also. The former may diffuse fast electrons up to relativistic
energies, while the latter reflects slow electrons as well as ions that have
speeds comparable with the group velocity of the pulse, and tend to form
flat-top electron distributions at and around the quasi-soliton.Comment: 12th International Congress on Plasma Physics, 25-29 October 2004,
Nice (France