Sub-picotesla widely tunable atomic magnetometer operating at room-temperature in unshielded environments
Abstract
We report on a single-channel rubidium radio-frequency atomic magnetometer operating in un-shielded environments and near room temperature with a measured sensitivity of 130 fT/\sqrt{Hz}. We demonstrate consistent, narrow-bandwidth operation across the kHz - MHz band, corresponding to three orders of magnitude of magnetic field amplitude. A compensation coil system controlled by a feedback loop actively and automatically stabilizes the magnetic field around the sensor. We measure a reduction of the 50 Hz noise contribution by an order of magnitude. The small effective sensor volume, 57 mm^3, increases the spatial resolution of the measurements. Low temperature operation, without any magnetic shielding, coupled with the broad tunability, and low beam power, dramatically extends the range of potential field applications for our device.
Keywords
Cite
@article{arxiv.1804.05124,
title = {Sub-picotesla widely tunable atomic magnetometer operating at room-temperature in unshielded environments},
author = {Cameron Deans and Luca Marmugi and Ferruccio Renzoni},
journal= {arXiv preprint arXiv:1804.05124},
year = {2018}
}
Comments
Main text: 6 pages, 9 figures. Supplementary material: 3 pages, 3 figures. Published version can be found at https://aip.scitation.org/doi/full/10.1063/1.5026769 . V2: Added journal layout, minor typos fixed. Content unchanged