Scientific Results

Optical spectroscopy of a microsized Rb vapor sample in magnetic fields up to 58 T

Year: 2017

Authors: Ciampini D., Battesti R., Rizzo C., Arimondo E.

Autors Affiliation: Dipartimento di Fisica E. Fermi, Università di Pisa, Largo B. Pontecorvo 3, Pisa, 56127, Italy; INO-CNR, Via G. Moruzzi 1, Pisa, 56124, Italy; CNISM, UdR Dipartimento di Fisica E. Fermi, Università di Pisa, Largo B. Pontecorvo 3, Pisa, 56127, Italy; Laboratoire National des Champs Magnétiques Intenses (UPR 3228 CNRS-UPS-UGA-INSA), Toulouse Cedex, F-31400, France

Abstract: We use a magnetometer probe based on the Zeeman shift of the rubidium resonant optical transition to explore the atomic magnetic response for a wide range of field values. We record optical spectra for fields from a few tesla up to 60 T, the limit of the coil producing the magnetic field. The atomic absorption is detected by the fluorescence emissions from a very small region with a submillimeter size. We investigate a wide range of magnetic interactions from the hyperfine Paschen-Back regime to the fine one and the transitions between them. The magnetic field measurement is based on the rubidium absorption itself. The rubidium spectroscopic constants were previously measured with high precision, except the excited state Landé g-factor that we derive from the position of the absorption lines in the transition to the fine Paschen-Back regime. Our spectroscopic investigation, even if limited by the Doppler broadening of the absorption lines, measures the field with a 20 ppm uncertainty at the explored high magnetic fields. Its accuracy is limited to 75 ppm by the excited state Landé g-factor determination.

Journal/Review: PHYSICAL REVIEW A

Volume: 96 (5)      Pages from: 052504-1  to: 052504-9

More Information: ANR-10-LABX-0037. – This research has been partially supported through NEXT (Grant No. ANR-10-LABX-0037) in the framework of the “Programme des Investissements d\’Avenir.” E.A. acknowledges financial support from the Chair d\’Excellence Pierre de Fermat of the Conseil Regional Midi-Pyrenées. The authors thank S. George, N. Bruyant, J. Béard, and S. Scotto for technical support and are grateful to R. Mathevel for very useful suggestions on the manuscript.
KeyWords: HYPERFINE-STRUCTURE; METAL ATOMS; ZEEMAN; STATE; QUADRUPOLE; MAGNETOMETER; RESOLUTION; SODIUM; RB-87
DOI: 10.1103/PhysRevA.96.052504

English