Abstract: A generator for producing nonvacuum electron beam, and discharging electric energy to grounded targets. The generator includes a pulsed electron beam accelerator utilizing a Tesla transformer, obtaining its earth connection by the displacement current of an isolation capacitor, driving a cold cathode electron gun with a gasdynamic window to create an electrically conductive ionized channel in the free atmosphere. The generator includes a variable impedance source of high voltage direct current, connected across the isolation capacitor, providing a sustained potential difference between the cathode of the electron gun and the grounded target. The potential difference produces a conduction current and heat in the ionized channel.