HIGH VOLTAGE NANOSECOND DISCHARGES IN AIR AT NONUNIFORM CONFIGURATION OF ELECTRIC FIELD

High voltage nanosecond diffuse discharges in a nonuniform electric field are studied experimentally using a recording system. Formation of "runaway" electrons in gases and (formation) the powerful electron beams on the discharge gap are considered. At atmospheric pressure X-ray radiation from discharge gap during the high voltage nanosecond breakdown has been fixed. It is shown that X-ray radiation at the discharge is initiated by "runaway" electrons.