Understanding the working of a B-dot probe
Abstract
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.
Keywords
Cite
@article{arxiv.2009.10722,
title = {Understanding the working of a B-dot probe},
author = {Sayak Bose and Manjit Kaur and Kshitish K Barada and Joydeep Ghosh and Prabal K Chattopadhyay and Rabindranath Pal},
journal= {arXiv preprint arXiv:2009.10722},
year = {2020}
}