Transient electromagnetic respoonse of a conducting cylinder in a conducting medium: numerical results
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Abstract
Numerical results for the transient electromagnetic response of a conducting infinite cylinder embedded in a conducting medium excited by an infinite line source are presented. The input current is a Heaviside function of time. The displacement currents are assumed to be negligible in comparison with the conduction currents. The contribution of n=o term (induced line current in the cylinder) is shown to predominate over the higher multipoles. As a rough rule the effect of the outer conductivity must be taken into consideration if it is more tan I0 ̄² times the conductivity of the cylinder.
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References
HOHMANN, G. W., 1971. Electromagnetic scattering by conductors in the earth near a line source of current: Geophysics, V. 36 : 101-131. DOI: https://doi.org/10.1190/1.1440150
PARRY, J. R., and S. H. WARD, 1971. Electromagnetic scattering from cylinders of arbitrary cross-section in a conductive half-space: Geophysics, V. 36 : 67-100. DOI: https://doi.org/10.1190/1.1440165
SINGH, S. K., 1972. Transient electromagnetic response of a conducting infinite cylinder embedded in a conducting medium: Geofísica Internacional, V. 12 : 7-22. DOI: https://doi.org/10.22201/igeof.00167169p.1972.12.1.989
SINGH, S. K., l 973a. On axially symmetric electric current induced in a cylinder under a line source: Geophysics, V. 38 : 971-975. DOI: https://doi.org/10.1190/1.1440387
SINGH, S. K., 1973b. Plane wave electromagnetic excitation of a cylinder: contribution of induced axially symmetric current: (Submitted to Geophysics for possible publication.)
SINGH, S. K., 1973c. Electromagnetic transient response of a conducting sphere embedded in a conducting medium: Geophysics, V. 38 : 864-893. DOI: https://doi.org/10.1190/1.1440381
VERMA, S. K., 1973. Time-dependent electromagnetic fields of an infinite conducting cylinder excited by a long current carrying cable: Geophysics, V. 38 : 369-379. DOI: https://doi.org/10.1190/1.1440347
WAIT, J. R., 1972. The effect of a buried conductor on the subsurface fields for a line source excitation: Radio Science, V. 7 : 587-591. DOI: https://doi.org/10.1029/RS007i005p00587
WAIT, J. R., 1973. Personal communication.
WAIT, J. R., and D. A. HILL, 1973. Excitation of a homogeneous conductive cylinder of finite length by a prescribed axial current distribution: Preliminary Report to U.S. Bureau of Mines on Contract No. H0I22061.