Work

An Optically Pumped Comagnetometer for High-sensitivity RF Detection without Magnetic Shielding

Year: 2024

Type: article

Abstract: We develop an optically-pumped magnetometer (OPM) sensitive in the radiofrequency(RF) regime based on 85 Rb in a natural abundance rubidium vapor cell to operate in dynamic geomagnetic field environments.Because high sensitivity operation of RF OPMs requires control of the magnetic field environment near DC, we develop an OPM comagnetometer that also utilizes the 87 Rb present within the same vapor cell to implement a secondary OPM variometer that provides information on the field-environment near DC.This information is used to provide feedback via a set of tri-axial field control coils that counters the unwanted effects of external geomagnetic fields from DC to 60 Hz, which in turn allows RF OPM operation with an intrinsic sensitivity of around 9 fT Hz -1/2 in the presence of external magnetic fields on the order of 10s of µT.

Source: OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)

Author: Bainbridge, Jonathan Edward

Institution: Sandia National Laboratories

Language: English

Topic: Atomic and Subatomic Physics Research

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, National Nuclear Security Administration, Sandia National Laboratories

Awards: G11630931, G2214935549, G413247060, G4903105778, G5339743583, G855168022

OpenAlex ID: W4402385440

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