The electron beam parameters of the plasma-cathode gun measured the representative of the TWI company (Cambridge, England) by the diagnostic equipment of the same company. The results of measurements of focused electron beam brightness with an energy up to 60keV and power up to 4kW was (1,6÷2,0)·10¹⁰A·m^-2·sr^-1. The measurements were performed for the focal length of 0,5m. Beam diameter does not exceed 460mkm.