simpeg.electromagnetics.time_domain.sources.CircularLoop#

class simpeg.electromagnetics.time_domain.sources.CircularLoop(receiver_list=None, location=None, orientation='z', radius=1.0, current=1.0, n_turns=1, mu=1.25663706127e-06, srcType='inductive', **kwargs)[source]#

Bases: MagDipole

Circular loop magnetic 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!).

Parameters:

receiver_listlist of simpeg.electromagnetics.time_domain.receivers.BaseRx: A list of TDEM receivers
location(dim) np.ndarray, default = np.r_[0., 0., 0.]: Source location.
orientation{‘z’, ‘x’, ‘y’} or (3) numpy.ndarray: Loop orientation.
radiusfloat, default = 1.: Loop radius
currentfloat, default = 1.: Source current
mufloat: Background magnetic permeability
srcType{‘inductive’, “galvanic”}: ‘inductive’ to implement as inductive source and ‘galvanic’ to implement as galvanic source
Nint, default = 1: Number of turns in the loop

Attributes

`N`	n_turns.N has been deprecated.
`current`	Source current
`integrate`	Integrated source term
`location`	Location of the dipole
`moment`	Dipole moment of the loop.
`mu`	Magnetic permeability in H/m
`nD`	Number of data associated with the source.
`n_turns`	Number of turns in the loop.
`orientation`	Orientation of the dipole as a normalized vector
`radius`	Loop radius
`receiver_list`	List of receivers associated with the source
`srcType`	Implement at inductive or galvanic source
`uid`	Universal unique identifier
`vnD`	Vector number of data.
`waveform`	Current waveform for the source

Methods

`bInitial`(simulation)	Compute initial magnetic flux density.
`bInitialDeriv`(simulation[, v, adjoint, f])	Returns `Zero` for `BaseTDEMSrc`
`eInitial`(simulation)	Returns `Zero` for `BaseTDEMSrc`
`eInitialDeriv`(simulation[, v, adjoint, f])	Returns `Zero` for `BaseTDEMSrc`
`eval`(simulation, time)	Return magnetic and electric source terms at a given time
`evalDeriv`(simulation, time[, v, adjoint])	Derivative of magnetic and electric source terms time a vector at a given time
`get_receiver_indices`(receivers)	Get indices for a subset of receivers within the source's receivers list.
`hInitial`(simulation)	Compute initial magnetic field.
`hInitialDeriv`(simulation[, v, adjoint, f])	Returns `Zero` for `BaseTDEMSrc`
`jInitial`(simulation)	Returns `Zero` for `BaseTDEMSrc`
`jInitialDeriv`(simulation[, v, adjoint, f])	Returns `Zero` for `BaseTDEMSrc`
`s_e`(simulation, time)	Electric source term (s_e) at a given time
`s_eDeriv`(simulation, time[, v, adjoint])	Returns `Zero` for `BaseTDEMSrc`
`s_m`(simulation, time)	Magnetic source term (s_m) at a given time
`s_mDeriv`(simulation, time[, v, adjoint])	Returns `Zero` for `BaseTDEMSrc`