Abstract
A theoretical study is presented for alternating magnetic fields in a sphere and a long cylinder; this is extended to frequencies such that differences in diameter and surface conductivity are not distinguished in Förster's method. Optimal conditions for structural testing of the entire cross-section are found to occur in the audiofrequency range. Tables are given for the second derivatives of the real and imaginary components of the Bessel and McDonald functions.
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References
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Belikov, B.I. Choice of optimal conditions in electromagnetic analysis. Soviet Physics Journal 8, 90–97 (1965). https://doi.org/10.1007/BF00827927
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DOI: https://doi.org/10.1007/BF00827927