Outputs (8)

Designing Optimal Loop, Saddle, and Ellipse-Based Magnetic Coils by Spherical Harmonic Mapping (2023)
Journal Article
Hobson, P. J., Hardwicke, N. L., Davis, A., Smith, T. X., Morley, C., Packer, M., …Fromhold, M. (2023). Designing Optimal Loop, Saddle, and Ellipse-Based Magnetic Coils by Spherical Harmonic Mapping. IEEE Transactions on Instrumentation and Measurement, 72, Article 1005815. https://doi.org/10.1109/TIM.2023.3284138

Adaptable, low-cost, coils designed by carefully selecting the arrangements and geometries of simple primitive units are used to generate magnetic fields for diverse applications. These extend from magnetic resonance and fundamental physics experimen... Read More about Designing Optimal Loop, Saddle, and Ellipse-Based Magnetic Coils by Spherical Harmonic Mapping.

Benchtop magnetic shielding for benchmarking atomic magnetometers (2023)
Journal Article
Hobson, P. J., Holmes, N., Patel, P., Styles, B., Chalmers, J., Morley, C., …Fromhold, M. (2023). Benchtop magnetic shielding for benchmarking atomic magnetometers. IEEE Transactions on Instrumentation and Measurement, 72, Article 6007309. https://doi.org/10.1109/tim.2023.3293540

Here, a benchtop hybrid magnetic shield containing four mumetal cylinders and nine internal flexible printed circuit boards is designed, constructed, tested, and operated. The shield is designed specifically as a test-bed for building and operating u... Read More about Benchtop magnetic shielding for benchmarking atomic magnetometers.

Enabling ambulatory movement in wearable magnetoencephalography with matrix coil active magnetic shielding (2023)
Journal Article
Holmes, N., Rea, M., Hill, R. M., Leggett, J., Edwards, L. J., Hobson, P. J., …Bowtell, R. (2023). Enabling ambulatory movement in wearable magnetoencephalography with matrix coil active magnetic shielding. NeuroImage, 274, Article 120157. https://doi.org/10.1016/j.neuroimage.2023.120157

The ability to collect high-quality neuroimaging data during ambulatory participant movement would enable a wealth of neuroscientific paradigms. Wearable magnetoencephalography (MEG) based on optically pumped magnetometers (OPMs) has the potential to... Read More about Enabling ambulatory movement in wearable magnetoencephalography with matrix coil active magnetic shielding.

Bespoke magnetic field design for a magnetically shielded cold atom interferometer (2022)
Journal Article
Hobson, P. J., Vovrosh, J., Stray, B., Packer, M., Winch, J., Holmes, N., …Holynski, M. (2022). Bespoke magnetic field design for a magnetically shielded cold atom interferometer. Scientific Reports, 12(1), Article 10520. https://doi.org/10.1038/s41598-022-13979-4

Quantum sensors based on cold atoms are being developed which produce measurements of unprecedented accuracy. Due to shifts in atomic energy levels, quantum sensors often have stringent requirements on their internal magnetic field environment. Typic... Read More about Bespoke magnetic field design for a magnetically shielded cold atom interferometer.

Magnetic field design in a cylindrical high-permeability shield: The combination of simple building blocks and a genetic algorithm (2022)
Journal Article
Packer, M., Hobson, P. J., Davis, A., Holmes, N., Leggett, J., Glover, P., …Fromhold, T. M. (2022). Magnetic field design in a cylindrical high-permeability shield: The combination of simple building blocks and a genetic algorithm. Journal of Applied Physics, 131(9), Article 093902. https://doi.org/10.1063/5.0071986

Magnetically sensitive experiments and newly developed quantum technologies with integrated high-permeability magnetic shields require increasing control of their magnetic field environment and reductions in size, weight, power, and cost. However, ma... Read More about Magnetic field design in a cylindrical high-permeability shield: The combination of simple building blocks and a genetic algorithm.

Optimised hybrid shielding and magnetic field control for emerging quantum technologies (2021)
Conference Proceeding
Hobson, P. J., Packer, M., Holmes, N., Davis, A., Patel, P., Holmes, D., …Fromhold, T. M. (2021). Optimised hybrid shielding and magnetic field control for emerging quantum technologies. In M. J. Padgett, K. Bongs, A. Fedrizzi, & A. Politi (Eds.), Proceedings Volume 11881, Quantum Technology: Driving Commercialisation of an Enabling Science II. https://doi.org/10.1117/12.2598780

The accurate control of magnetic fields is a cornerstone of multiple emerging quantum technologies. These technologies often require passive high permeability magnetic shielding and internal active field-generating coils to create their own bespoke m... Read More about Optimised hybrid shielding and magnetic field control for emerging quantum technologies.

Planar Coil Optimization in a Magnetically Shielded Cylinder (2021)
Journal Article
Packer, M., Hobson, P. J., Holmes, N., Leggett, J., Glover, P., Brookes, M. J., …Fromhold, T. M. (2021). Planar Coil Optimization in a Magnetically Shielded Cylinder. Physical Review Applied, 15(6), Article 064006. https://doi.org/10.1103/PhysRevApplied.15.064006

Hybrid magnetic shields with both active field generating components and high-permeability magnetic shielding are increasingly needed for various technologies and experiments that require precision-controlled magnetic field environments. However, the... Read More about Planar Coil Optimization in a Magnetically Shielded Cylinder.

Optimal Inverse Design of Magnetic Field Profiles in a Magnetically Shielded Cylinder (2020)
Journal Article
Packer, M., Hobson, P., Holmes, N., Leggett, J., Glover, P., Brookes, M., …Fromhold, T. (2020). Optimal Inverse Design of Magnetic Field Profiles in a Magnetically Shielded Cylinder. Physical Review Applied, 14(5), Article 054004. https://doi.org/10.1103/PhysRevApplied.14.054004

Magnetic shields that use both active and passive components to enable the generation of a tailored low-field environment are required for many applications in science, engineering, and medical imaging. Until now, accurate field nulling, or field gen... Read More about Optimal Inverse Design of Magnetic Field Profiles in a Magnetically Shielded Cylinder.