  Magnetic pickup loops or B-dot probes are one of the oldest known sensors of
time-varying magnetic fields. The operating principle is based on Faraday's law
of electromagnetic induction. However, obtaining accurate measurements of
time-varying magnetic fields using these kinds of probes is a challenging task.
A B-dot probe and its associated circuit are prone to electrical oscillations.
As a result, the measured signal may not faithfully represent the magnetic
field sampled by the B-dot probe. In this paper, we have studied the transient
response of a B-dot probe and its associated circuit to a time-varying magnetic
field. Methods of removing the oscillations pertaining to the detector
structure are described. After removing the source of the oscillatory signal,
we have shown that the time-integrated induced emf measured by the digitiser is
linearly proportional to the magnetic field sampled by the B-dot probe, thus
verifying the faithfulness of the measured signal.
