Abstract
A method for experimental evaluation of the magnetic-field attenuation coefficients under a pulsed action is considered. A technique for the preliminary processing of measurement results for low useful signal-to-noise ratios is considered taking the features of the operation of digital oscilloscopes into account. The analysis of the spectral composition of measured signals and a method for their approximation in the time domain, which allows elimination of the influence of measuring-sensor noise and digital-oscilloscope rounding errors, are presented. The results of estimating the frequency dependence of the magnetic-field attenuation coefficients for a copper shield in comparison with the results of a theoretical calculation are presented. The considered method allows simultaneous determination of the coefficients of the magnetic-field attenuation by the shield in a wide frequency range.
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V. I. Kravchenko, E. A. Bolotov, and N. I. Letunova, Radioelektronnye Sredstva i Moshchnye Elektromagnitnye Pomekhi (Radioelectronic Means and Powerful Electromagnetic Noises), Moscow Radio i Svyaz’, 1987.
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Original Russian Text © R.Yu. Golikov, P.V. Nikulin, 2017, published in Pribory i Tekhnika Eksperimenta, 2017, No. 3, pp. 49–53.
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Golikov, R.Y., Nikulin, P.V. A pulse method to estimate the efficiency of shielding magnetic fields. Instrum Exp Tech 60, 351–355 (2017). https://doi.org/10.1134/S0020441217020178
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DOI: https://doi.org/10.1134/S0020441217020178