The paper presents the results of our theoretical investigations of fast electron beam generation in high-temperature plasma of a laser plume and further acceleration of electrons in atmosphere. The discharge formation in these inhomogeneous media was also investigated. Results of calculations have shown an opportunity of generation of fast beam with a current in a range ≈ 10^2 - 10^3 A from the laser plume with the length of 5 mm and the area of 0.1 mm^2. The main reason of limitation of fast electrons current pulse was the breakdown of the discharge gap. The preliminary experiments carried out by us have shown the correctness of chosen direction.
System of diagnostics of the high-power electron accelerator based on undisturbing methods and measuring tools of electron beam characteristics as well as amplitude-time characteristics of the pulse forming system is presented. The analysis of amplitude-time characteristics reproducibility of the electromagnetic pulse formation system, electron beam spectral characteristics and properties of bremsstrahlung in the position of test specimen under given modes of operation of the accelerator performs using developed software. Possibilities of complex diagnostics of the power accelerator electron beams acceleration regime and accelerator units are illustrated by analysis of the accelerating tube parameters.
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