Progress toward a microwave frequency standard based on laser-cooled large scale 171Yb+ ion crystal
Abstract
We report on progress towards a microwave frequency standard based on a laser-cooled 171Yb+ ion trap system. The electronics, lasers, and magnetic shields are integrated into a single physical package. With over 1E5 ions are stably trapped, the system offers a high signal-to-noise ratio Ramsey line-shape. In comparison with previous work, the frequency instability of a 171Yb+ microwave clock was further improved to 8.5 × 10 - 13/ τ for averaging times between 10 and 1000 s.
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