Topic
Buffer gas
About: Buffer gas is a research topic. Over the lifetime, 3565 publications have been published within this topic receiving 47283 citations.
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TL;DR: In this article, the authors describe and discuss experiments related to the phenomenon of population trapping of ytterbium ions in the extremely long-lived 4f13 6s2 2F7/2 level ion clouds are confined in a radiofrequency trap in the presence of helium buffer gas.
Abstract: We describe and discuss experiments related to the phenomenon of population trapping of ytterbium ions in the extremely long-lived 4f13 6s2 2F7/2 level Ion clouds are confined in a radiofrequency trap in the presence of helium buffer gas The experimental set-up permits electronic ion detection, the observation of resonance fluorescence, and optical excitation at alternating wavelengths to excite either the 2S1/2–2P1/2 resonance transition, or transitions of similar wavelength which provide optical deexcitation of ions from the 2F7/2 level to the ground state The observed dependence of the population trapping rates on helium pressure is attributed to the effect of fine structure mixing collisions The transitions which deexcite ions from the 2F7/2 state show Lorentzian lineshapes with widths of 6–10 GHz and resonance wavelengths which are in significant disagreement with tabulated level positions
35 citations
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TL;DR: In this article, the inversion temperature of a single Neon buffer gas vapour microcell was measured to be about 80°C for two different samples and a proposal to develop chip scale atomic clocks with improved long-term frequency stability, simpler configuration (a single buffer gas instead of a buffer gas mixture) and relaxed constraints on pressure accuracy during the cell filling procedure was presented.
Abstract: Presented is the observation of a quadratic temperature dependence of the Cs 0-0 ground state hyperfine resonance frequency in a single Neon (Ne) buffer gas vapour microcell. The inversion temperature, expected to be theoretically independent of the buffer gas pressure, is measured to be about 80°C for two different samples. A proposal to develop chip scale atomic clocks with improved long-term frequency stability, simpler configuration (a single buffer gas instead of a buffer gas mixture) and then relaxed constraints on pressure accuracy during the cell filling procedure is presented.
35 citations
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TL;DR: In this article, the origin of Li deficiency in films grown by laser ablation of single-crystal LiNbO3 targets in a buffer gas was investigated by analyzing the stoichiometry of the deposited films as a function of the following parameters: the distance target-substrate, the nature of the buffer gas (He, O2, and Ar) and the deposition configuration.
Abstract: The origin of Li deficiency in films grown by laser ablation of single-crystal LiNbO3 targets in a buffer gas has been investigated by analyzing the stoichiometry of the deposited films as a function of the following parameters: the distance target-substrate, the nature of the buffer gas (He, O2, and Ar) and the deposition configuration. The results show that significant Li losses are related to scattering processes during the expansion regime which are higher the higher the mass of the gas species. The results show that the Li content of the films can be enhanced by setting the substrate either at distances larger than the plume length or in a configuration in which the substrate is not facing the target.
35 citations
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TL;DR: The first hyperpolarized xenon MRI (HypX-MRI) offers a new tion trapping that promises temporal and spatial resolutions comparable to conventional Hyperpolarization of Xe is achieved through spin-exchange collisions with optically pumped Rb vapor.
34 citations