[en] Experimental results on a 10¹⁵cm^-3 plasma heating by a microsecond electron beam at the GOL-3 device are presented. The beam of 100 kJ energy content was injected in the hydrogen plasma placed inside a 7-m-long solenoid with 5.5 T magnetic field. The experiments were emphasized on the studies of the bulk plasma heating by means of laser scattering technique and on the beam energy spectrum analysis after its passing the plasma. The decay of the plasma temperature after the beam injection and is discussed. 19 refs.; 16 figs