Bi-planar magnetic stabilisation coils for an inertial sensor based on atom interferometry

• DOI: 10.48550/arxiv.2312.05020
• Publication Date: 2023-01-01
• Authors: Alister Davis; P. J. Hobson; Thomas X. Smith; C.K. Morley; Henry Sewell; J. P. Cotter; T. M. Fromhold
• Keywords: Atom interferometer; Sigma

Inertial sensors that measure the acceleration of ultracold atoms promise unrivalled accuracy compared to classical equivalents. However, atomic systems are sensitive various perturbations, including magnetic fields, which can introduce measurement inaccuracies. To address this challenge, we have designed, manufactured, and validated a field stabilisation system for quantum sensor based on atom interferometry. We solve generated by surface currents in-between pair rectangular coils approximate current using discrete wires. The wires wound by-hand onto machined panels retrofitted existing mounting structure without interfering with any experimental components. Along central $60$ mm $y$-axis, aligns trajectory during interferometry, measured generate an independent uniform axial strength $B_z=\left(22.81\pm0.01\right)$ $\mu$T/A [$\mathrm{mean}\pm2\sigma\mathrm{std. error}$] linear gradient $\mathrm{d}B_z/\mathrm{d}y=\left(10.6\pm0.1\right)$ $\mu$T/Am. $B_z$ is deviate maximum value $1.3$% in same region, factor three times more than previously-used on-sensor compensation set.