Characterization Method of Gas Discharge Tube Under High-altitude Electromagnetic Pulse

Besides the peak amplitude of the electromagnetic interference, other norms such root action and peak rate of rise time play an important role in evaluating the immunity of electric device to HEMP. Therefore, the spark-over voltage of GDT provided by manufactures is not enough for supporting its application in HEMP protection field. A characterization method based on GDT spark-over voltage amplitude and delay time is proposed in this paper, which can be used to predict the residual waveform and describe the performance of GDT under HEMP excitation. Meanwhile, the method is validated by different HEMP conducted environment. The work will be helpful to evaluate the protection effect of GDT to HEMP.