SEMINAR      Thursday, 9 September 2004 - h. 15:00  Auditorium B. Touschek     A.N. LEBEDEV (Moscow) CHERENKOV RADIATION  IN ELECTRODYNAMICS STRUCTURES AND ITS APPLICATIONS Abstract The long-term interaction of uniformly moving charged particles and an electromagnetic mode of a slow-wave waveguide is considered in terms of regular and/or reversed Cherenkov effect. Coherent Cherenkov radiation is treated as an origin of beam loading in linear accelerators and a soruce of high-power radiation. Limitations of choherence in rarified and dense beams are considered. Simulated Cherenkov radiation in high-current devices and its potentialities are discussed .