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Updated: Aug 25, 2025

Magnetic Tweezers for the Measurement of Twist and Torque
Published on: May 19, 2014
Vector magnetometer based on the effect of coherent population trapping
Abstract:
The method is presented for converting a coherent population trapping (CPT) atomic clock into a CPT vector (compass-) magnetometer without mechanically moving parts through a relatively simple add-on. The system of 3D Helmholtz coils was used for compensation of the external magnetic field, allowing measurement of both strength and direction of a magnetic field at the sensitivity level of sub-nT/Hz1/2 within a 10-Hz bandwidth. Angular resolution of the developed vector magnetometer amounts to about 10-2 degrees.
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