F-state quenching with CH{sub 4} for buffer-gas cooled {sup 171}Y b{sup +} frequency standard

Hunker, J. D.; Schwindt, P. D. D.

doi:10.1063/1.4935562

F-state quenching with CH{sub 4} for buffer-gas cooled {sup 171}Y b{sup +} frequency standard

Journal Article · Sun Nov 15 04:00:00 EST 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4935562· OSTI ID:22492194

Hunker, J. D.; Schwindt, P. D. D. ^[1]

Sandia National Laboratories, Albuquerque, New Mexico 87123 (United States)

We report that methane, CH{sub 4}, can be used as an efficient F-state quenching gas for trapped ytterbium ions. The quenching rate coefficient is measured to be (2.8 ± 0.3) × 10{sup 6} s{sup −1} Torr{sup −1}. For applications that use microwave hyperfine transitions of the ground-state {sup 171}Y b ions, the CH{sub 4} induced frequency shift coefficient and the decoherence rate coefficient are measured as δν/ν = (−3.6 ± 0.1) × 10{sup −6} Torr{sup −1} and 1/T{sub 2} = (1.5 ± 0.2) × 10{sup 5} s{sup −1} Torr{sup −1}. In our buffer-gas cooled {sup 171}Y b{sup +} microwave clock system, we find that only ≤10{sup −8} Torr of CH{sub 4} is required under normal operating conditions to efficiently clear the F-state and maintain ≥85% of trapped ions in the ground state with insignificant pressure shift and collisional decoherence of the clock resonance.

OSTI ID:: 22492194

Journal Information:: AIP Advances, Journal Name: AIP Advances Journal Issue: 11 Vol. 5; ISSN AAIDBI; ISSN 2158-3226

Country of Publication:: United States

Language:: English

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A highly miniaturized vacuum package for a trapped ion atomic clock Schwindt, Peter D. D.; Jau, Yuan-Yu; Partner, Heather Review of Scientific Instruments, Vol. 87, Issue 5 https://doi.org/10.1063/1.4948739	journal	May 2016
Laser-cooled ytterbium-ion microwave frequency standard Mulholland, S.; Klein, H. A.; Barwood, G. P. Applied Physics B, Vol. 125, Issue 11 https://doi.org/10.1007/s00340-019-7309-6	journal	October 2019

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74 ATOMIC AND MOLECULAR PHYSICS
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