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Semerikov, I. A.

Publications and source records attributed to Semerikov, I. A..

5 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Compact ultrastable laser system for spectroscopy of {sup 2}S{sub 1/2} → {sup 2}D{sub 3/2} quadrupole transition in {sup 171}Yb{sup +} ion

We report the results of studying a compact laser system designed for manipulating a quantum state of the optical qubit based on the {sup 2}S{sub 1/2} → {sup 2}D{sub 3/2} quadrupole transition in the {sup 171}Yb{sup +} ion at a wavelength of 435.5 nm. An emission power of the laser system reaches 500 μW at λ = 435.5 nm and the relative frequency instability of at most 3 × 10{sup −15} is achieved at averaging intervals from 0.5 to 50 s with a subtracted linear frequency drift. The compactness of the developed system makes it possible to employ it in transportable systems including optical clocks. (laser spectroscopy)

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
DOE OSTI2018

On the thermal noise limit of ultrastable optical cavities

We consider two methods of lowering thermal noise, which limits the attainable frequency stability of lasers stabilised to a high-Q external Fabry – Perot cavity. These are cavity lengthening and use of high-Q mechanical materials in the production of its constituent parts. The results of numerical simulation are outlined for the horizontal and vertical suspension systems of the cavity body and its sensitivity to vibrations in these cases. The progress in the development of ultrastable laser systems using cryogenic silicon cavities is also discussed. (paper)

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
DOE OSTI2017

Microwave frequency standard on {sup 25}Mg{sup +} ions: expected characteristics and prospects

A scheme of the new frequency standard is reported based on a microwave transition between hyperfine components of the ground state in {sup 25}Mg{sup +} ions. It is proposed to capture ions into a linear quadrupole Paul trap and to perform the laser cooling, as well as to prepare the particle ensemble and to implement detection by using a single laser system based on a semiconductor laser. Characteristics of the suggested frequency standard are estimated. (paper)

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
DOE OSTI2016

Multiparticle losses in a linear quadrupole Paul trap

A linear quadrupole Paul trap is fabricated for capturing magnesium and aluminium ions. An experimental cycle performed has demonstrated ion capture and holding in a trap with an average ion lifetime of 1.7 s. Modelling of ion dynamics in the trap shows that the main mechanism responsible for losses of hot ions is multiparticle interaction, which results in that a kinetic energy of some ions increases and they leave the trapping zone. This mechanism is completely suppressed if ions are cooled. Another mechanism is the charge exchange; however, it is not substantial at a high average energy of ions produced in the result of an electron impact. Parameters of the trap allow one to perform precision spectroscopic measurements and to control ion quantum states. (laser cooling)

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗