Miniature Biplanar Coils for Alkali-Metal-Vapor Magnetometry
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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14
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Physical Review Applied, Volume 18, issue 1, pp. 1-14
Abstract
Atomic spin sensors offer precision measurements using compact microfabricated packages, placing them in a competitive position for both market and research applications. The performance of these sensors, such as the dynamic range, may be enhanced through magnetic field control. In this work, we discuss the design of miniature coils for three-dimensional localized field control by direct placement around the sensor, as a flexible and compact alternative to global approaches used previously. Coils are designed on biplanar surfaces using a stream-function approach and then fabricated using standard printed-circuit techniques. Application to a laboratory-scale optically pumped magnetometer of sensitivity approximately 20 fT/root Hz is shown. We also demonstrate the performance of a coil set measuring 7 x 17 x 17 mm(3) that is optimized specifically for magnetoencephalography, where multiple sensors are operated in close proximity to one another. Characterization of the field profile using Rb-87 free-induction spectroscopy and other techniques show > 96% field homogeneity over the target volume of a MEMS vapor cell and a compact stray-field contour of approximately 1% at 20 mm from the center of the cell.Description
| openaire: EC/H2020/820393/EU//macQsimal | openaire: EC/H2020/766402/EU//ZULF | openaire: EC/H2020/754510/EU//PROBIST Funding Information: The work was funded by: the European Union Horizon 2020 research and innovation programme under project macQsimal (Grant Agreement No. 820393); the Horizon H2020 Marie Skłodowska-Curie Actions projects ITN ZULF-NMR (Grant Agreement No. 766402) and PROBIST (Grant Agreement No. 754510); the Spanish MINECO project OCARINA (the PGC2018-097056-B-I00 project funded by MCIN/AEI/10.13039/501100011033/FEDER, “A way to make Europe”); the Severo Ochoa program (Grant No. SEV-2015-0522); the Generalitat de Catalunya through the CERCA program; the Agència de Gestió d’Ajuts Universitaris i de Recerca under Grant No. 2017-SGR-1354; the Secretaria d’Universitats i Recerca del Departament d’Empresa i Coneixement de la Generalitat de Catalunya, cofunded by the European Union Regional Development Fund within the ERDF Operational Program of Catalunya (project QuantumCat, ref. 001-P-001644); the Fundació Privada Cellex; and the Fundació Mir-Puig. M.C.D.T. acknowledges financial support through the Junior Leader Postdoctoral Fellowship Programme from the “La Caixa” Banking Foundation (project LCF/BQ/PI19/11690021). We also thank Jacques Haesler, Sylvain Karlen, and Thomas Overstolz of the Centre Suisse d’Electronique et de Microtechnique SA (CSEM) in Neuchâtel (Switzerland) for supplying the MEMS vapor cells. Publisher Copyright: © 2022 American Physical Society.
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Tayler, M C D, Mouloudakis, K, Zetter, R, Hunter, D, Lucivero, V G, Bodenstedt, S, Parkkonen, L & Mitchell, M W 2022, 'Miniature Biplanar Coils for Alkali-Metal-Vapor Magnetometry', Physical Review Applied, vol. 18, no. 1, 014036, pp. 1-14. https://doi.org/10.1103/PhysRevApplied.18.014036