Operation mode of the strontium optical lattice clock with internal cryogenic chamber

Mikhail G. Gurov1 *, Elena G. Gurova2

1 FSUE “VNIIFTRI”, Mendeleevo, Moscow region, Russia
gurov_mg@vniiftri.ru ( *corresponding author), SPIN-code: 1373-3246, ORCID: 0000-0003-4958-1304, WoS Research ID: C-8209-2014, Scopus ID: 54395517900, Google Scholar: GrJjSlsAAAAJ
2 FSBEI HE “Novosibirsk State University of Economics and Management ‘NINKh’” (NSUEM), Novosibirsk, Russia
lena319@mail.ru, SPIN-code: 4525-9907, ORCID: 0000-0001-5254-4796, WoS Research ID: P-2695-2015, Scopus ID: 55823011600

Al’manac of Modern Metrology № 4 (44) 2025, pages 34–46

The page of the article in Russian

Original article

Abstract. In this article, we consider the features of the design of two optical-vacuum systems generations for optical clocks with ambient thermal radiation elimination. The differences in the placement of Stirling cryogenic coolers relative to the vacuum spectro­­scope are demonstrated, and estimates of the ramp-up time for these designs are presen­ted. Data on the maximum cryogenic chamber temperature without significantly degra­ding the ultimate uncertainty possible under ground-based clock conditions are provided. Features of the multilayer chambers of previous- and new-generation cryogenically co­oled optical spectroscopes are described. In these multilayer chambers, atoms are inter­­rogated to obtain information on the state of the optical frequency keeper stabilization system. Diagrams of the calculating the distribution of thermal fields in the cooling sys­tems of the internal chambers of the optical-vacuum systems are presented. A qualitative comparative assessment of the ramp-up time for optical clocks with cryogenic mode is conducted.

Keywords: optical clocks, laser cooling, black-body radiation shift, cryogenic chamber, Stirling cooler

For citation: Gurov M.G., Gurova E.G. Operation mode of the strontium optical lattice clock with internal cryogenic chamber. Almanac of Modern Metrology. 44 (4), 34–46 (2025).

Contribution of the authors. Both authors made a significant contribution to the creation of the paper.
Conflict of interests. The authors have no conflict of interest in the content of the paper.

The article was submitted 18.09.2025; approved after reviewing 25.09.2025; accepted for publication 29.09.2025.

Full texts of articles are available only in Russian in printed issues of the magazine.

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