A new time domain field computation due to vertical magnetic dipole in the vicinity of a planar dielectric interface based on approximation method

2002 ◽  
Author(s):  
G.Z. Rafi ◽  
R. Moini ◽  
R. Faraji-Dana
Keyword(s):  
Magnetic Dipole ◽  
Approximation Method ◽  
Time Domain ◽  
Dielectric Interface ◽  
Field Computation ◽  
Vertical Magnetic Dipole ◽  
New Time

The frequency and the time‐domain responses of a buried axial conductor

Geophysics ◽  
1980 ◽  
Vol 45 (5) ◽  
pp. 941-951 ◽  
Author(s):  
Koji Tsubota ◽  
James R. Wait
Keyword(s):  
Magnetic Dipole ◽  
Time Domain ◽  
Dipole Source ◽  
Earth Model ◽  
Layered Earth ◽  
Vertical Magnetic Dipole ◽  
Lateral Inhomogeneity ◽  
Impedance Condition ◽  
The Time Domain ◽  
Lower Medium

Our objective is to analyze the frequency and the time‐domain responses of a two‐dimensional lateral inhomogeneity such as an axial conductor which is buried in a stratified earth. Such inhomogeneities in the earth’s structure give complex transients that cannot be interpreted using just a uniformly layered earth model. To proceed, we determine the fields of a thin axial conductor carrying a filamental current situated in the lower medium of a two‐layered earth. This infinitely long axial conductor is characterized by a specific axial impedance. The impedance condition can be used to determine the total field response when the source is a magnetic dipole. Some results are presented that show the waveform at the induced current in a buried axial conductor excited by an impulsive current in a vertical magnetic dipole source located on the earth’s surface. A feature of the waveform is the reversal of the polarity that would not occur in the absence of the buried cable.

Use of the diffuse approximation method for electromagnetic field computation

1994 ◽  
Vol 30 (5) ◽  
pp. 3558-3561 ◽  
Author(s):  
Y. Marechal ◽  
J.L. Coulomb ◽  
G. Meunier ◽  
G. Touzot
Keyword(s):  
Electromagnetic Field ◽  
Approximation Method ◽  
Field Computation ◽  
Diffuse Approximation
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