SLF Electromagnetic Fields in Stratified Media

2012 ◽  
Vol 263-266 ◽  
pp. 35-38
Author(s):  
Zhi Yi Chen ◽  
Sui Hua Zhou
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetic Fields ◽  
Field Intensity ◽  
Electric Dipole ◽  
Near Field ◽  
Stratified Media ◽  
Vertical Electric Dipole ◽  
Vlf Waves ◽  
Better Than

SLF waves travel in the air as vertical polarized vaves while as horizonal polarized vaves in the seawater,which have less attenuation than VLF waves. It propagates as lateral electromagnetic wave from seawater into air,whose energy will be concentrated on the interface. Comparisons of electromagnetic fields generated by vertical electric dipole in the air and horizonal electric dipole in the sea have been done.The results indicate that: (a) unit vertical electric dipole in the air is better than unit horizonal electric dipole in the sea. (b)when the receiver is below the boundary,the sources in the air provide stronger E field intensity than the sources in the sea do. (c)in the near field(1000km), underwater transmitting is hard to be achieved.

Effect of a Conducting Overburden on the Fields of a Buried Dipole Source

1975 ◽  
Vol 53 (6) ◽  
pp. 598-609 ◽  
Author(s):  
V. Ramaswamy ◽  
H. W. Dosso
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Analytical Solutions ◽  
Electric Dipole ◽  
Lower Layer ◽  
Low Frequency ◽  
Dipole Source ◽  
Vertical Electric Dipole ◽  
Electric And Magnetic Fields ◽  
Horizontal Electric Dipole

Analytical solutions for the low frequency electromagnetic fields of a dipole source situated in the lower layer of a two layer conductor are derived. The sources considered are a vertical electric dipole, a horizontal electric dipole, and a horizontal magnetic dipole. The numerical results discussed in this paper describe the general behavior of the electric and magnetic fields for various upper layer conductivities, upper layer thickness, and source depths. The results are of interest in the application of electromagnetic techniques to locate miners trapped underground following a mine disaster.

ELF Near-Field Propagation of a Vertical Electric Dipole Due to Lightning Discharges

2021 ◽  
pp. 1-1
Author(s):  
Hong Lei Xu ◽  
Xin Wang ◽  
Mingjie Pang ◽  
Xiaopeng Ji ◽  
Hai Lin ◽  
...  
Keyword(s):  
Electric Dipole ◽  
Near Field ◽  
Vertical Electric Dipole ◽  
Lightning Discharges

Transient marine electromagnetics in shallow water: A sensitivity and resolution study of the vertical electric field at short ranges

Geophysics ◽  
2014 ◽  
Vol 79 (1) ◽  
pp. E39-E49 ◽  
Author(s):  
Pavel O. Barsukov ◽  
Edward B. Fainberg
Keyword(s):  
Shallow Water ◽  
Electric Dipole ◽  
Near Field ◽  
Marine Electromagnetics ◽  
Transverse Resistance ◽  
Vertical Electric Dipole ◽  
Vertical Electric Field ◽  
Horizontal Electric Dipole ◽  
The Time Domain ◽  
Dipole Sources

We analyzed the sensitivity of transient step-off responses of shallow-water marine controlled-source electromagnetic configurations, specifically, horizontal electric dipole sources and vertical electric dipole receivers in the near field of the time domain ([Formula: see text]). The capabilities of this configuration were compared with commonly used configurations, specifically, horizontal electric dipole sources and horizontal electric dipole receivers in the frequency domain ([Formula: see text]). By examining some simplified models of local hydrocarbon reservoirs representing separate resistive bodies of limited size buried at different depths in the conductive sediments, and an example of a complex 3D geologic structure, the applications of [Formula: see text] and [Formula: see text] configurations and their limitations in terms of depth, size, and transverse resistance were evaluated.

scholarly journals DERIVATION OF GENERALIZED THOMAS–BARGMANN–MICHEL–TELEGDI EQUATION FOR A PARTICLE WITH ELECTRIC DIPOLE MOMENT

2013 ◽  
Vol 28 (29) ◽  
pp. 1350147 ◽  
Author(s):  
TAKESHI FUKUYAMA ◽  
ALEXANDER J. SILENKO
Keyword(s):  
Dipole Moment ◽  
Electromagnetic Fields ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Classical Equation ◽  
Spin Motion ◽  
Electric Dipole Moments ◽  
Momentum Direction ◽  
Telegdi Equation

General classical equation of spin motion is explicitly derived for a particle with magnetic and electric dipole moments in electromagnetic fields. Equation describing the spin motion relative to the momentum direction in storage rings is also obtained.

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