Design and simulation of a source of cold cadmium for atom interferometry

Year: 2023

Authors: Bandarupally S., Tinsley JN., Chiarotti M., Poli N.

Autors Affiliation: Univ Firenze, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Sesto Fiorentino, Italy; Univ Firenze, LENS, Via G Sansone 1, I-50019 Sesto Fiorentino, Italy; Univ Liverpool, Dept Phys, Liverpool L69 7ZE, England; CNR INO, Sesto Fiorentino, Italy.

Abstract: We present a novel optimised design for a source of cold atomic cadmium, compatible with continuous operation and potentially quantum degenerate gas production. The design is based on spatially segmenting the first and second-stages of cooling with the strong dipole-allowed 1S0-1P1 transition at 229 nm and the 326 nm 1S0-3P1 intercombination transition, respectively. Cooling at 229 nm operates on an effusive atomic beam and takes the form of a compact Zeeman slower (similar to 5 cm) and two-dimensional magneto-optical trap (MOT), both based on permanent magnets. This design allows for reduced interaction time with the photoionising 229 nm photons and produces a slow beam of atoms that can be directly loaded into a three-dimensional MOT using the intercombination transition. The efficiency of the above process is estimated across a broad range of experimentally feasible parameters via use of a Monte Carlo simulation, with loading rates up to 108 atoms s-1 into the 326 nm MOT possible with the oven at only 100 circle C. The prospects for further cooling in a far-off-resonance optical-dipole trap and atomic launching in a moving optical lattice are also analysed, especially with reference to the deployment in a proposed dual-species cadmium-strontium atom interferometer.

Journal/Review: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS

Volume: 56 (18)      Pages from: 185301-1  to: 185301-15

More Information: We thank Aidan Arnold and Stefan Truppe for useful discussions, Nicola Grani and Shamaila Manzoor for initial work on the simulations, and Leonardo Salvi for help with the magnetic field calculations. This work has been supported by the European Research Council, Grant No. 772126 (TICTOCGRAV). J N T acknowledges the support of the Horizon Europe Grant ID 101080164 (UVQuanT).
KeyWords: cadmium; atom interferometry; laser cooling
DOI: 10.1088/1361-6455/acf3bf

Citations: 1
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