SimPEG.electromagnetics.frequency_domain.sources.MagDipole#
- class SimPEG.electromagnetics.frequency_domain.sources.MagDipole(receiver_list, frequency, location=None, moment=1.0, orientation='z', mu=1.25663706212e-06, **kwargs)[source]#
Bases:
SimPEG.electromagnetics.frequency_domain.sources.BaseFDEMSrc
Point magnetic dipole source calculated by taking the curl of a magnetic vector potential. By taking the discrete curl, we ensure that the magnetic flux density is divergence free (no magnetic monopoles!).
This approach uses a primary-secondary in frequency. Here we show the derivation for E-B formulation noting that similar steps are followed for the H-J formulation.
We split up the fields and
into primary ( ) and secondary ( ) componentsand define a zero-frequency primary simulation, noting that the source is generated by a divergence free electric current
Since
is curl-free, divergence-free, we assume that there is no constant field background, the , so our primary problem isOur secondary problem is then
- Parameters
- receiver_list
list
of
SimPEG.electromagnetics.frequency_domain.receivers.BaseRx
A list of FDEM receivers
- frequency
float
Source frequency
- location(
dim
)numpy.ndarray
, default:numpy.r_
[0., 0., 0.] Source location.
- moment
float
Magnetic dipole moment amplitude
- orientation{‘z’, x’, ‘y’}
or
(dim
)numpy.ndarray
Orientation of the dipole.
- mu
float
Background magnetic permeability
- receiver_list
Attributes
Location of the dipole
Amplitude of the dipole moment of the magnetic dipole (
)Magnetic permeability in H/m
Orientation of the dipole as a normalized vector
Methods
bPrimary
(simulation)Compute primary magnetic flux density.
hPrimary
(simulation)Compute primary magnetic field.
s_e
(simulation)Electric source term (s_e)
s_eDeriv
(simulation, v[, adjoint])Derivative of electric source term with respect to the inversion model
s_m
(simulation)Magnetic source term (s_m)
Galleries and Tutorials using SimPEG.electromagnetics.frequency_domain.sources.MagDipole
#

Heagy et al., 2017 1D RESOLVE and SkyTEM Bookpurnong Inversions

Heagy et al., 2017 1D RESOLVE Bookpurnong Inversion

1D Forward Simulation for a Susceptible and Chargeable Earth