Narrow beam atomic oven in vacuum device systems for reproducing ultra-stable frequency standard for surveying and geodetic positioning equipment

In this paper the features of the process, which includes the stages of miniaturization or, more precisely, compactization of the frequency reference device. This device is potentially applicable in the design process and for drawing design layouts, as well as in systems for tracking the position of mining and quarry equipment. The basic principles for obtaining operation substances in the required phase, which is necessary for the functioning of optical frequency systems in devices for reproducing ultra-stable clock frequencies based on alkaline earth metals, are presented. We describe a compacted source of atoms of alkaline earth metals, developed during an experiment on laser cooling of atoms in a source of ultrastable frequency. This source makes it possible to obtain a continuous flow of atoms, stable in intensity, for 10 years from one refill of 10 g of metal, which in turn reduces operating costs for maintenance and refilling. The source body is made of stainless steel to ensure vacuum cleanliness. There are no intra-vacuum heaters. The upper limit of the operating temperature for the sublimation of atoms is limited in absolute value to 600–650 °C, and in a high-quality implementation by the physical destruction of the heater materials. During the experiment, the narrow focus of this source was estimated at a level of less than 32 mrad. And sufficient to obtain a signal-to-noise flow of atoms no worse than 1013 [1/sec·cm2] at a temperature of 430 °C and an observation distance of 33 cm. Tubular heating elements from a household soldering station can be used as heating elements. The originality of the idea is supported by the implementation of an insulated air layer between the heated volume and the outer part of the device, preventing heating of the housing.

Gurov M. G., Gurova E. G. Narrow beam atomic oven in vacuum device systems for reproducing ultra-stable frequency standard for surveying and geodetic positioning equipment. MIAB. Mining Inf. Anal. Bull. 2024;(12-1):245-257. [In Russ]. DOI: 10.25018/0236_ 1493_2024_121_0_245.

M.G. Gurov, Cand. Sci. (Phys. Mathem.), Senior Researcher, Russian Metrological Institute of Technical Physics and Radio Engineering, Mendeleevo, 141570, Russia, e-mail: goorovmg@mail.ru, ORCID ID: 0000-0003-4958-1304,
E.G. Gurova, Cand. Sci. (Eng.), Assistant Professor, Novosibirsk State Technical University, 630073, Novosibirsk, Russia, e-mail: lena319@mail.ru, ORCID ID: 0000-0001-5254-4796.

M.G. Gurov, e-mail: goorovmg@mail.ru.

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