التفاصيل البيبلوغرافية
| العنوان: |
F-state quenching with CH4 for buffer-gas cooled 171Yb+ frequency standard. |
| المؤلفون: |
Jau, Y. Y., Hunker, J. D., Schwindt, P. D. D. |
| المصدر: |
AIP Advances; 2015, Vol. 5 Issue 11, p1-8, 8p |
| مصطلحات موضوعية: |
METHANE, QUENCHING (Chemistry), BUFFER solutions |
| مستخلص: |
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 171Yb ions, the CH4 induced frequency shift coefficient and the decoherence rate coefficient are measured as δv/v = (-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 171Yb+ 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. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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