An integrated system of hardware and software allowing precise definition of arbitrarily oriented magnetic fields up to |B| = 1 μT within a five-layer Mumetal shield is described. The system is calibrated with reference to magnetic resonance observed between Zeeman states of the 6S1/2 F = 4 133Cs ground state. Magnetic field definition over the full 4π solid angle is demonstrated with one-sigma tolerances in magnitude, orientation, and gradient of δ|B| = 0.94 nT, δθ = 5.9 mrad, and pT/mm, respectively. This field control is used to empirically map Mx magnetometer signal amplitude as a function of the static field (B0) orientation.
High-precision control of static magnetic field magnitude, orientation, and gradient using optically pumped vapour cell magnetometry
S. J. Ingleby, P. F. Griffin, A. S. Arnold, M. Chouliara, E. Riis; High-precision control of static magnetic field magnitude, orientation, and gradient using optically pumped vapour cell magnetometry. Rev. Sci. Instrum. 1 April 2017; 88 (4): 043109. https://doi.org/10.1063/1.4980159
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