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

doi:10.1063/1.4980159

High-precision control of static magnetic field magnitude, orientation, and gradient using optically pumped vapour cell magnetometry

Rev Sci Instrum. 2017 Apr;88(4):043109. doi: 10.1063/1.4980159.

Authors

S J Ingleby¹, P F Griffin¹, A S Arnold¹, M Chouliara¹, E Riis¹

Affiliation

¹ Department of Physics, SUPA, Strathclyde University, 107 Rottenrow East, Glasgow, United Kingdom.

PMID: 28456251
DOI: 10.1063/1.4980159

Abstract

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 6S_1/2 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 δ|∇B|=13.0 pT/mm, respectively. This field control is used to empirically map M_x magnetometer signal amplitude as a function of the static field (B₀) orientation.