Tri-axial time-dependent magnetic field calibrated in-situ by harmonic analysis of adiabatically evolving atomic spins
Year: 2025
Authors: Bevilacqua G., Biancalana V., Dancheva Y., Fregosi A.
Autors Affiliation: Univ Siena, DSFTA, Via Roma 56, I-53100 Siena, Italy; Aerospazio Tecnol S r l, I-53040 Rapolano Terme, SI, Italy; Ist Nazl Ottica, CNR, Via G Moruzzi 1, I-56124 Pisa, Italy.
Abstract: We introduce a methodology to calibrate in situ a set of coils generating bi- or tri-axial magnetic fields, at frequencies where a calibration performed under static conditions would be inaccurate. The methodology uses harmonic analysis of one component of the magnetization of an atomic sample whose spins adiabatically follow an ad hoc applied time-dependent field. The procedure enables the identification of phases and amplitudes of the coil currents required to produce a dynamic magnetic field with the assigned polarization. This determines coil constants that can be subsequently used to produce arbitrary three-dimensional time-dependent fields.
Journal/Review: JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume: 58 (28) Pages from: 285001-1 to: 285001-9
More Information: A Fregosi is pleased to acknowledge the support of EuPRAXIA Advanced Photon Sources project under the contract EuAPS IR0000030, CUP I93C21000160006. G Bevilacqua acknowledges the partial support of the MIUR Project PRIN 2020, Mathematics for Industry 4.0, Project No. 2020F3NCPX, and of the GNFM-INdAM.KeyWords: adiabatic evolution of spins; atomic magnetometry; harmonic analysis; calibration techniquesDOI: 10.1088/1361-6463/adeb97
