High homogeneity permanent magnet for diamond magnetometry
Arne Wickenbrock, Huijie Zheng, Georgios Chatzidrosos, Joseph Shaji, Rebeirro, Tim Schneemann, and Peter Bluemler
TL;DR
This paper presents the design and characterization of a high-homogeneity Halbach magnet suitable for diamond magnetometry, achieving a very uniform magnetic field for advanced imaging applications.
Contribution
It introduces a novel 10 cm diameter double Halbach ring with exceptional magnetic field homogeneity tailored for diamond-based microwave-free imaging.
Findings
Magnetic field homogeneity <100 ppm over the specified volume
Successful construction and characterization of the Halbach array
Demonstrated suitability for diamond magnetometry applications
Abstract
Halbach magnets are a source of homogeneous magnetic field in an enclosed volume while keeping stray fields at a minimum. Here, we present the design, construction, and characterization for a 10 cm inner diameter double Halbach ring providing a homogeneous (<100 ppm over 1 x 1 x 0.5 cm3) magnetic field of around 105 mT, which will be used for a diamond based microwave-free widefield imaging setup. The final characterization is performed with a novel fiberized diamond-based sensor on a 3D translation stage documenting the high homogeneity of the constructed Halbach array and its suitability for the proposed use.
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