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Journal of Physics Conference Series

Toward the use of an additional degree of freedom of the Zeeman slower frequency tuning

Mikhail Gurov, Elena G. Gurova, Nikolay V. Pustovoy

Published Oct 1, 2021• 0 citations

Abstract

In this paper the simplifying possibility of the scheme of the optical lattice clocks using a single source of the slowing laser radiation for the two installations of the 87 Sr isotope optical clocks is considered. We designed the scheme where the correction of the constant component of the partial frequency-detuning magnetic field for the each Zeeman slower is achieved. Calculations of the resonance curve of the longitudinal magnetic field of the slower field are given with the introduction of the additional magnetic component into the calculation for the additional detuning and, at the same time, the frequency detuning of the magnetic field profile by an additional coil. The field of the additional coil, which is included into Zeeman slower, does not change the resonance profile of the magnetic field. The possibility of detuning within the width of the cooling transition is shown.

DOI: 10.1088/1742-6596/2032/1/012005

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We develop a permanent-magnet Zeeman slower with adjustable magnets along the longitudinal and radial directions. Produced by four arrays of cylindrical magnets, the longitudinal magnetic field in the slower is tunable if relevant parameters vary, for example, laser detuning or intensity. The proposed Zeeman slower can be reconfigured for Sr atoms. Additionally, we demonstrate that the residual magnetic field produced by the permanent magnets in the magneto-optical trap region can be as small as 0.5 Gs.

Transverse Zeeman slower composed of an array of permanent magnets is investigated for Sr optical clock. We calculated the magnetic field distribution of 88 Sr atoms based on experimental condition, achieving a reduction of the velocity of atoms from 410 m/s to 50 m/s. The atoms flux through the transverse magnetic field was 7.9×105. Such permanent Zeeman slower needs no high currents or water cooling and the spatial distribution of its magnetic field can be adjusted. Another advantage of this Zeeman slower is its small size and high reliability. Therefore, a miniature Zeeman slower can be attained.

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