Abstract
In the frame of the theory of weak turbulence the propagation ofelectron beams is considered. Using the smallness of quasilinear timetransition from kinetic equations to gas-dynamic ones has been done.The obtained gas-dynamic equations are solved for one, two andN monoenergetic beams. It is shown that each beam generallypropagates as a beam-plasma structure consisting of electrons andLangmuir waves. Interaction of the structures at their propagationleads to electron exchange and spatial shape changing. Differentsituations are discussed in dependence on initial beam velocities anddensities.
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