High dynamic-range and portable magnetometer using ensemble
nitrogen-vacancy centers in diamond
- URL: http://arxiv.org/abs/2402.15748v1
- Date: Sat, 24 Feb 2024 07:10:11 GMT
- Title: High dynamic-range and portable magnetometer using ensemble
nitrogen-vacancy centers in diamond
- Authors: Himanshu Kumar, Dasika Shishir, Maheshwar Mangat, Siddharth Tallur,
and Kasturi Saha
- Abstract summary: Nitrogen vacancy (NV) centers in diamonds have been explored for realizing a wide range of sensing applications.
Here we realize a compact and portable magnetometer with an ensemble of NV centers which we call the Quantum MagPI.
- Score: 2.5515299924109858
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Nitrogen vacancy (NV) centers in diamonds have been explored for realizing a
wide range of sensing applications in the last decade due to their unique
quantum properties. Here we realize a compact and portable magnetometer with an
ensemble of NV centers which we call the Quantum MagPI (Quantum Magnetometer
with Proportional Integral control). Including the sensor head and associated
electronics, our sensor assembly can fit inside 10 cm x 10 cm x 7 cm box and
control electronics in 30 cm x 25 cm x 5 cm box. We achieve a bandwidth
normalized sensitivity of ~ 10 nT/sqrt(Hz). Using closed-loop feedback for
locking to the resonance frequency, we extend the linear dynamic range to 200
microT (20x 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. Additionally, we demonstrate
the utility of such a magnetometer by real-time tracking the movement of the
elevator car and door opening by measuring the projection of the magnetic field
along one of the NV-axes under ambient temperature and humidity.
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