Pulsed high magnetic field measurement via a Rubidium vapor sensor

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 a 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 realized 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 of monitoring the light transmitted by the Rb cell, which is usual, we also monitor the fluorescence emission of the gas sample from a very small volume with the advantage of reducing the impact of the field inhomogeneity on the field measurement. Our sensor has been tested up to about 58~T.

arXiv commentSubmitted to Review Scientific Instruments

References in corpus (3)

• Optical Magnetometry
• CODATA Recommended Values of the Fundamental Physical Constants: 2014
• Calculation of strongly forbidden M1 transitions and g-factor anomalies in atoms considered for parity non-conservation measurements

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• Optical spectroscopy of a microsized Rb vapour sample in magnetic fields up to 58 tesla
• Precision Measurement of the Excited State Landé g-factor and Diamagnetic Shift of the Cesium D${}_2$ Line
• Measurement of the ratio between g-factors of the ground states of ${}^{87}$Rb and ${}^{85}$Rb
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