The wake-field excitation in plasma-dielectric structure by sequence of short bunches of relativistic electrons

Considering a plasma-dielectric structure we aim for two goals. Firstly instead of a single not simply realized dense bunch, the wake-field is proposed to be excited by a sequence of bunches of the same total charge but with a smaller density, obtained in the resonance linear accelerator. Secondly, plasma filling of the beam transit channel in dielectric permits to avoid the excited field sagging at the channel axis that arises significantly the excitation efficiency. The electrodynamics of the dielectric and hybrid plasma dielectric structures, the simulations of processes of wake-field excitation by the sequence of bunches of relativistic electrons are represented.