Impedance of long solenoids with nonferrous tubular cores
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To assist in the practical application of nondestructive eddy-current test methods, theoretical solutions have been derived for the normalised impedance of long solenoids encircling nonferrous metallic tubular conductors. Calculated values are presented in tabular form for a range of tube dimensions and test frequencies of practical interest.
[1] N. Mclachlan. Bessel functions for engineers , 1934 .