Abstract: The proposed ionizing radiation generator comprises an ionizing radiation emitter including a resonance transformer whose field winding is arranged near the low-voltage end of the step-up winding, electrically associated with the electrically conducting housing of the resonance transformer. The emitter also includes an accelerating tube whose high-voltage electrode is coupled to the high-voltage end of the step-up winding of the resonance transformer and attached to one of the ends of the tubular insulator of the accelerating tube which accommodates the step-up winding. The low-voltage electrode of the accelerating tube is electrically associated with the housing, while a source of charged particles is arranged in the evacuated inner space of the accelerating tube disposed between the housing and the tubular insulator, one of the electrodes of the tube being electrically associated with the charged particle source.