Investigations of plasma wake-fields in NSC KIPT

Along with reviewing of the world wide investigations of wake fields, excited in plasma by a short electron bunch or a train of bunches and by laser bear-wave or a short laser pulse, the theoretical and experimental research activity in National Science Center 'Kharkov Institute of Physics and Technology' (NSC KIPT) with the aim of plasma wake fields excitation by a train of relativistic electron bunches, produced by resonant linacs, are represented. The considerable attention is devoted to the wake fields investigation in the experimental department, headed by A.K.Berezin. Plasma wake fields are reviewed as a tool for the elaboration of accelerators of new generation, plasma lens for relativistic electron beam focusing, and for the development of new principles of HF-generators construction. The researching works performed in NSC KIPT and planned ones in the future are discussed. The state of art and perspectives of theoretical and experimental investigations are considered. The recent achievements in the laboratories of the world are represented