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Mitigation of He permeation in microfabricated vapor cells with alumino-silicate glass and Al2O3 coatings

Year: 2023
Type: conference-paper
Abstract: We study helium permeation in micro-fabricated Cs vapor cells built with alumino-silicate glass (ASG) or borosilicate (BSG) windows, coated or not with Al2O3 layers. Gas permeation rate is derived from long-term measurements of the pressure-shifted clock hyperfine transition frequency in a coherent population trapping (CPT) clock setup. We find that the use of ASG windows reduces, in comparison with BSG, He permeation by more than two orders of magnitude whereas cells with Al2O3 coated BSG exhibit permeation rates up to 100 times smaller than those measured with bare BSG.
Source: HAL
Authors: Carlé, Clément, Keshavarzi, Shervin, Mursa, Andrei, Karvinen, Petri, Chutani, Ravinder Kumar, Bargiel, Sylwester, Vicarini, Rémy, Abbé, Philippe, Abdel Hafiz, Moustafa, Maurice, Vincent, Boudot, Rodolphe, Passilly, Nicolas
Institutions: Franche-Comté Électronique Mécanique Thermique et Optique - Sciences et Technologies, University of Eastern Finland, Centre National de la Recherche Scientifique, Université de Lille, Institut d'Electronique, de Microélectronique et de Nanotechnologie, Centrale Lille Institut
Language: English
Open Access status: green
OpenAlex ID: W4387293100
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