We consider the possibility of propagation of short beams of charged particles (beam solitons) in a retarding system. By using a selfconsistent analysis of the nonlinear kinetic equation and the Maxwell equations, we obtain the conditions under which the particles which propagate in a dielectric waveguide are confined by the proper longitudinal field. We discuss the possibility of compression of the beam to durations shorter than one nanosecond by using a transformation of the beam parameters.
Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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