High dynamic-range and portable magnetometer using ensemble nitrogen-vacancy centers in diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2024-07-01 |
| Journal | Review of Scientific Instruments |
| Authors | Himanshu Kumar, Dasika Shishir, Maheshwar Mangat, Siddharth Tallur, Kasturi Saha |
| Institutions | Indian Institute of Technology Bombay |
| Citations | 7 |
Abstract
Section titled āAbstractāNitrogen vacancy (NV) centers in diamonds have been explored for a wide range of sensing applications in the last decade due to their unique quantum properties. In this work, we report a compact and portable magnetometer with an ensemble of NV centers, which we call the Quantum MagPI (Quantum Magnetometer with Proportional Integral control). Our fully integrated compact sensor assembly and control electronics fit inside a 10 Ć 10 Ć 7 cm3 box and a 30 Ć 25 Ć 5 cm3 rack-mountable box, respectively. We achieve a bandwidth normalized sensitivity of ā¼10 nT/Hz. Using closed-loop feedback for locking to the resonance frequency, we extend the linear dynamic range to 200 Ī¼T (20Ć improvement compared to the intrinsic dynamic range) without compromising the sensitivity. We report a detailed performance analysis of the magnetometer through measurements of noise spectra, Allan deviation, and tracking of nT-level magnetic fields in real-time. In addition, we demonstrate the utility of such a magnetometer by real-time tracking of the movement of an elevator car and door opening events by measuring the projection of the magnetic field along one of the NV-axes under ambient temperature and humidity conditions.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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