simpeg.electromagnetics.viscous_remanent_magnetization.waveforms.StepOff.getLogUniformDecay#
- StepOff.getLogUniformDecay(fieldType, times, chi0, dchi, tau1, tau2)[source]#
Return characteristic decay for a step-off waveform for a log-uniform distribution of time-relaxation constants.
The output of this function is the magnetization at each time for each cell, normalized by the inducing field.
- Parameters:
- fieldType{‘dhdt’, ‘dbdt’}
Field type.
- times
numpy.ndarray Observation times. These times MUST be during the off-time.
- chi0
float DC (zero-frequency) magnetic susceptibility for all cells
- dchi
float DC (zero-frequency) magnetic susceptibility attributed to VRM for all cells
- tau1
float Lower-bound for log-uniform distribution of time-relaxation constants for all cells
- tau2
float Upper-bound for log-uniform distribution of time-relaxation constants for all cells
- Returns:
- eta(
n_times)numpy.ndarray Characteristic decay evaluated at all specified times.
- eta(