Spectral characteristics of microwave emission of a high-voltage extended atmospheric discharge based on wavelet analysis
Batrakov P. K.1, Baidin I. S. 1, Rodionov A. A. 1, Oginov A. V.1
1Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
Email: p.batrakov@lebedev.ru
A spark discharge at the pre-breakdown stage is a source of high-power microwave pulses. The Morlet wavelet transform was used for frequency-time localization of high-amplitude bursts. Exponential approximation was used to characterize quantitatively the signal dynamics. It provided an opportunity to determine the key parameters: initial amplitude α and attenuation rate β. Two groups of flares differing in their attenuation nature were identified by processing the experimental data. Statistical analysis revealed a discrepancy between the distribution of coefficients and the normal law, which underscores the stochastic nature of processes. The results of this study contribute to a deeper understanding of the mechanisms of microwave radiation generation in electric discharge systems. Keywords: wavelet analysis, radio emission, atmospheric spark discharge, streamer.
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