scholarly journals Numerical analysis of direct time-domain response of transient electromagnetic field in homogeneous half space

2016 ◽  
Author(s):  
Heyua Wang ◽  
Guoqian Xue ◽  
Hua Guo
Keyword(s):  
Electromagnetic Field ◽  
Numerical Analysis ◽  
Half Space ◽  
Time Domain ◽  
Homogeneous Half Space ◽  
Transient Electromagnetic ◽  
Time Domain Response

Research on Application of all Time Apparent Resistivity Translation Algorithm for Large Fixed Loop TEM

2014 ◽  
Vol 644-650 ◽  
pp. 3620-3624
Author(s):  
Fei Long Li ◽  
Xi’an Zhu
Keyword(s):  
Electromagnetic Field ◽  
Half Space ◽  
Apparent Resistivity ◽  
Observation Time ◽  
Test Point ◽  
Homogeneous Half Space ◽  
Transient Electromagnetic ◽  
Analytic Expression ◽  
Research On Application ◽  
Translational Expansion

In order to calculate the all-time apparent resistivity for large fixed loop more quickly, the transient electromagnetic field analytic expression for lager fixed loop in homogeneous half space is analyzed in this paper. The facts that the curve has a characteristic of translational expansion and contraction with the conductivity, the test point coordinates and observation time are discovered. A new method using translation algorithm to calculate all-time apparent resistivity is proposed for the large fixed loop. A new calculation equation of all-time apparent resistivity for large fixed loop is derived which shows that the method is feasible and effective.

scholarly journals Transient electromagnetic field radiated by grounding systems caused by lightning strike in a dissipative half-space

2017 ◽  
Vol 4 (1) ◽  
pp. 1410986
Author(s):  
T. Rouibah ◽  
A. Bayadi ◽  
N. Harid ◽  
K. Kerroum ◽  
Farrokh Aminifar
Keyword(s):  
Electromagnetic Field ◽  
Half Space ◽  
Lightning Strike ◽  
Transient Electromagnetic

Time-Domain Electromagnetic-Field Transmission Between Small-Loop Antennas on a Half-Space With Conductive and Dielectric Properties

2020 ◽  
Vol 68 (2) ◽  
pp. 938-946
Author(s):  
Martin Stumpf ◽  
Giulio Antonini ◽  
Ioan E. Lager ◽  
Guy A. E. Vandenbosch
Keyword(s):  
Electromagnetic Field ◽  
Dielectric Properties ◽  
Half Space ◽  
Time Domain ◽  
Small Loop ◽  
Time Domain Electromagnetic ◽  
Loop Antennas

Time-domain analysis of transient electromagnetic field generated by aerial busbars above lossy soil

2002 ◽  
Vol 38 (2) ◽  
pp. 773-776 ◽  
Author(s):  
Tiebing Lu ◽  
Xiang Cui ◽  
Haoliu Yin ◽  
Lin Li
Keyword(s):  
Electromagnetic Field ◽  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Transient Electromagnetic

scholarly journals Transient electromagnetic field above a permeable and conducting half-space

1985 ◽  
Vol 81 (3) ◽  
pp. 623-639 ◽  
Author(s):  
R. Ignetik ◽  
Y.- C. Thio ◽  
K. C. Westfold
Keyword(s):  
Electromagnetic Field ◽  
Half Space ◽  
Transient Electromagnetic

ELECTROMAGNETIC COUPLING IN FREQUENCY AND TIME‐DOMAIN INDUCED‐POLARIZATION SURVEYS OVER A MULTILAYERED EARTH

Geophysics ◽  
1973 ◽  
Vol 38 (2) ◽  
pp. 380-405 ◽  
Author(s):  
Abhijit Dey ◽  
H. Frank Morrison
Keyword(s):  
Half Space ◽  
Time Domain ◽  
Electromagnetic Coupling ◽  
Complete Solution ◽  
Induced Polarization ◽  
Arbitrary Length ◽  
Polarization Measurements ◽  
Homogeneous Half Space ◽  
Dipole Configuration ◽  
Off Time

Electromagnetic coupling responses in frequency and time‐domain induced‐polarization measurements over a multilayered earth are evaluated. For collinear dipole‐dipole and pole‐dipole configurations over a dissipative layered subsurface, the percent frequency effects of electromagnetic coupling are seen to be as high as 60 percent for large [Formula: see text] values, where L is the length of the receiving dipole, [Formula: see text] is the conductivity of the top layer of the half‐space, and f is the higher frequency of excitation used. In both frequency and time‐domain analyses, the distinctive effects of layering compared to that of a homogeneous half‐space response are shown for different electrode configurations, layer geometry, and electrical parameters of the subsurface. The pole‐dipole configuration of electrodes, in general, exhibits higher coupling compared to the dipole‐dipole configuration. In time‐domain measurements, the late off‐time transient decays reflect almost entirely the normal polarizability of the layered subsurface, in that the coupling responses are significant only during the early off‐time of the transient. The mutual impedance between grounded dipoles of arbitrary length is computed by extension of the complete solution of the boundary‐value problem of a horizontal electric dipole situated over a multilayered half‐space. A number of nomograms are presented for various layered structures to eliminate the electromagnetic coupling response in the induced‐polarization measurements in order to obtain the true polarization effect of the subsurface.

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