Numerical simulation of low-frequency current density distributions in voxel-based human anatomy models due to ambient electric and magnetic fields

2004 ◽  
Author(s):  
M. Clemens
Keyword(s):  
Numerical Simulation ◽  
Magnetic Fields ◽  
Current Density ◽  
Low Frequency ◽  
Human Anatomy ◽  
Density Distributions ◽  
Electric And Magnetic Fields ◽  
Frequency Current

Exact solutions for the electron distribution in plane magnetrons. II. Parabolic potential with a minimum

1970 ◽  
Vol 315 (1523) ◽  
pp. 479-497 ◽  
Keyword(s):  
Magnetic Fields ◽  
Exact Solutions ◽  
Space Charge ◽  
Current Density ◽  
Potential Distribution ◽  
Electron Distribution ◽  
Potential Minimum ◽  
Density Distributions ◽  
Parabolic Potential ◽  
Electric And Magnetic Fields

Electron space charge and tangential current density distributions in crossed electric and magnetic fields are obtained for plane systems characterized by a parabolic potential distribution with a potential minimum in front of the cathode. Complete distribution of initial electron velocities in all three directions is taken into account; both medium and low magnetic fields are considered. This work completes some earlier calculations which have already been presented (Lindsay 1965).

scholarly journals The perturbation of electromagnetic fields at distances that are large compared with the object's size

2014 ◽  
Vol 80 (3) ◽  
pp. 865-892 ◽  
Author(s):  
Paul D Ledger ◽  
William R B Lionheart
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Asymptotic Expansions ◽  
Low Frequency ◽  
Perfect Conductor ◽  
Small Object ◽  
Leading Order ◽  
Material Parameters ◽  
Electric And Magnetic Fields

Abstract We rigorously derive the leading-order terms in asymptotic expansions for the scattered electric and magnetic fields in the presence of a small object at distances that are large compared with its size. Our expansions hold for fixed wavenumber when the scatterer is a (lossy) homogeneous dielectric object with constant material parameters or a perfect conductor. We also derive the corresponding leading-order terms in expansions for the fields for a low-frequency problem when the scatterer is a non-lossy homogeneous dielectric object with constant material parameters or a perfect conductor. In each case, we express our results in terms of polarization tensors.

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