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Title: F -state quenching with CH 4 for buffer-gas cooled 171 Y b + frequency standard [Methane (CH4) for quenching the F-state in trapped Yb+ ions].

Abstract

We report that methane, CH4, 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) × 106 s-1 Torr-1. For applications that use microwave hyperfine transitions of the ground-state 171Y b ions, the CH4 induced frequency shift coefficient and the decoherence rate coefficient are measured as δν/ν = (-3.6 ± 0.1) × 10-6 Torr-1 and 1/T2 = (1.5 ± 0.2) × 105 s-1 Torr-1. In our buffer-gas cooled 171Y b+ microwave clock system, we find that only ≤10-8 Torr of CH4 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.

Authors:
 [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
Defense Advanced Research Projects Agency (DARPA); USDOE
OSTI Identifier:
1339264
Report Number(s):
SAND-2015-5204J
Journal ID: ISSN 2158-3226; 594436
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 11; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Ground states; Clocks; Microwaves; Hyperfine structure; Methane

Citation Formats

Jau, Y. -Y., Hunker, J. D., and Schwindt, P. D. D. F -state quenching with CH 4 for buffer-gas cooled 171 Y b + frequency standard [Methane (CH4) for quenching the F-state in trapped Yb+ ions].. United States: N. p., 2015. Web. https://doi.org/10.1063/1.4935562.
Jau, Y. -Y., Hunker, J. D., & Schwindt, P. D. D. F -state quenching with CH 4 for buffer-gas cooled 171 Y b + frequency standard [Methane (CH4) for quenching the F-state in trapped Yb+ ions].. United States. https://doi.org/10.1063/1.4935562
Jau, Y. -Y., Hunker, J. D., and Schwindt, P. D. D. Sun . "F -state quenching with CH 4 for buffer-gas cooled 171 Y b + frequency standard [Methane (CH4) for quenching the F-state in trapped Yb+ ions].". United States. https://doi.org/10.1063/1.4935562. https://www.osti.gov/servlets/purl/1339264.
@article{osti_1339264,
title = {F -state quenching with CH 4 for buffer-gas cooled 171 Y b + frequency standard [Methane (CH4) for quenching the F-state in trapped Yb+ ions].},
author = {Jau, Y. -Y. and Hunker, J. D. and Schwindt, P. D. D.},
abstractNote = {We report that methane, CH4, 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) × 106 s-1 Torr-1. For applications that use microwave hyperfine transitions of the ground-state 171Y b ions, the CH4 induced frequency shift coefficient and the decoherence rate coefficient are measured as δν/ν = (-3.6 ± 0.1) × 10-6 Torr-1 and 1/T2 = (1.5 ± 0.2) × 105 s-1 Torr-1. In our buffer-gas cooled 171Y b+ microwave clock system, we find that only ≤10-8 Torr of CH4 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.},
doi = {10.1063/1.4935562},
journal = {AIP Advances},
number = 11,
volume = 5,
place = {United States},
year = {2015},
month = {11}
}

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Works referenced in this record:

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    Laser-cooled ytterbium-ion microwave frequency standard
    journal, October 2019