Scientific Results

Pulsed high magnetic field measurement with a rubidium vapor sensor

Year: 2017

Authors: George S., Bruyant N., Béard J., Scotto S., Arimondo E., Battesti R., Ciampini D., Rizzo C.

Autors Affiliation: Laboratoire National des Champs Magnétiques Intenses (UPR 3228 CNRS-UPS-UGA-INSA), Toulouse, Cedex, F-31400, France; 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

Abstract: We present a new technique to measure pulsed magnetic fields based on the use of rubidium in gas phase as a metrological standard. We have therefore developed an instrument based on laser inducing transitions at about 780 nm (D2 line) in rubidium gas contained in a mini-cell of 3 mm x 3 mm cross section. To be able to insert such a cell in a standard high-field pulsed magnet, we have developed a fibred probe kept at a fixed temperature. Transition frequencies for both the pi (light polarization parallel to the magnetic field) and sigma (light polarization perpendicular to the magnetic field) configurations are measured by a commercial wavemeter. One innovation of our sensor is that in addition to the usual monitoring of the light transmitted by the Rb cell, we also monitor the fluorescence emission of the gas sample from a volume of 0.13 mm(3). Our sensor has been tested up to about 58 T.

Journal/Review: REVIEW OF SCIENTIFIC INSTRUMENTS

Volume: 88 (7)      Pages from: 073102-1  to: 073102-9

More Information: This research has been partially supported through NEXT (Grant No. ANR-10-LABX-0037) in the framework of the \”Programme des Investissements dAvenir.\” E.A. acknowledges financial support from the \”Chaires D\’Excellence Pierre de Fermat\” of the \”Conseil Regional Midi-Pyrenees,\” France. S.S. acknowledges financial support from \”Universite Franco Italienne.\” The authors thank M. Badalassi (INO-CNR, Pisa) and N. Puccini (Universita di Pisa) for developing and testing the mini-cell of the present investigation, F. Thibout for filling the cell with rubidium at \”Laboratoire Kastler-Brossel\” (LKB, UPMC, Paris), G. Ballon and F. Giquel of LNCMI-Toulouse for the help in the probe construction, and R. Mathevet for support. The PLA structure has been realized using a 3D printer at the CampusFab of the \”Universite Toulouse III.\” Finally, we thank K. Hartman for carefully reading our manuscript.
KeyWords: HYPERFINE-STRUCTURE; RB-87; ATOMS; STATE
DOI: 10.1063/1.4993760

English