FIELD: measuring equipment. SUBSTANCE: the device has a power supply unit, recording unit, electrodes with discharge gap length D between them, connected to a spark-gap oscillator, which includes two series-connected circuits, the second circuit is an aperiodic one, and the first circuit is a periodic one, and a diode is cut in the second circuit. EFFECT: reduced break-down level and reduced dispersion of brightness of the spectral lines. 4 cl, 5 dwg
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