High homogeneity permanent magnet for diamond magnetometry

Halbach magnets are a source of homogeneous magnetic field in an enclosed volume while keeping stray fields at minimum. Here, we present the design, construction, and characterization for stack two rings with 10 cm inner diameter providing (<100 ppm over 1.0×1.0×0.5cm3) around 105 mT, which will be used diamond based microwave-free widefield imaging setup. The final is performed novel fiberized diamond-based sensor on 3D translation stage documenting high homogeneity constructed array its suitability proposed use.