QuSpin Zero-Field Magnetometer Characterization for the TUCAN Experiment

TL;DR

This paper characterizes the QuSpin Zero-Field Magnetometer's stability, linearity, and crosstalk effects, demonstrating its suitability for precise residual magnetic field mapping in the TUCAN nEDM experiment.

Contribution

It provides detailed performance metrics of the QZFM, including stability, linearity, and crosstalk, enabling its effective use in high-precision magnetic field measurements.

Findings

Intrinsic offset within 3 nT and stable over a year

Linearity within 2% up to 2 nTpp

Crosstalk effects are minimal with >6 cm separation

Abstract

The TUCAN nEDM experiment characterizes the QuSpin Zero-Field Magnetometer (QZFM) to accurately map residual fields within a large magnetically shielded room. The magnetometer's intrinsic offset was measured to be within 3 nT and stable over a period of one year. The response was shown to be within 2 percent of linearity in the zero-field regime, up to 2 nTpp, and then follows a smooth dispersion curve. Crosstalk effects induced by multisensor operation were determined to have a small effect, and inconsequential with a separation above 6 cm. These results enable the QZFM for accurate measurement of DC fields, increase the operational range of QZFM by a factor of more than an order of magnitude, and allow for higher efficiency and flexibility by green-lighting simultaneous operation of multiple QZFMs.