Pulsed vector atomic magnetometer using an alternating fast-rotating field.

ABSTRACT: We introduce a vector atomic magnetometer that employs a fast-rotating magnetic field applied to a pulsed ⁸⁷Rb scalar atomic magnetometer. This approach enables simultaneous measurements of the total magnetic field and its two polar angles relative to the rotation plane. Operating in gradiometer mode, the magnetometer achieves a total field gradient sensitivity of 35 fT/Hz (0.7 parts per billion) and angular resolutions of 6 nrad/Hz at a 50 μT Earth field strength. The noise spectra remain flat down to 1 Hz and 0.1 Hz, respectively. Here we show that this method overcomes several metrological challenges commonly faced by vector magnetometers and gradiometers. We propose a unique peak-altering modulation technique to mitigate systematic effects, including a newly identified dynam

SUBMITTER: Wang T 

PROVIDER: S-EPMC11799169 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature