It has been reported [1] that plasma acceleration by a electron beam results in a ion energy spectra that coincides with energy ion spectra of a pulsed vacuum discharges. Thus, one can assume that acceleration of plasma by electron beam is the basic plasma acceleration mechanism in a different types of a vacuum discharges. This work is devoted to examination the process of a plasma cloud expansion in a vacuum under different angles to electron beam direction. It was revealed that electrons and ions of a plasma cloud are being accelerated in a wide space angle (±60 degrees). Energies of a charged particles decrease with angle growth. Space angle of hydrogen ions expansion is larger than 60 degrees. Space angle of heavy ions expansion is less than 45 degrees.