The results of recent experimental research of different plasma sources for high-current electron beam generation are presented. Namely passive plasma sources (velvet-based cathode, carbon fiber cathode, multicapillary dielectric cathode, multislot cathode) based on flashover plasma, a ferroelectric plasma source (FPS), and a FPS-assisted hollow anode (HA) plasma source are described. Different time- and space-resolved electrical, optical and spectroscopic diagnostics were used for characterization of the plasma sources parameters. The main data concerning the plasma parameters (plasma density and temperature, plasma uniformity and plasma potential) and the main features of these plasma sources (plasma formation, lifetime, and vacuum compatibility) are considered.
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