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- W2866446677 abstract "Abstract Atomic clocks based on laser-cooled atoms are widely used as primary frequency standards. Deploying such cold atom clocks (CACs) in space is foreseen to have many applications. Here we present tests of a CAC operating in space. In orbital microgravity, the atoms are cooled, trapped, launched, and finally detected after being interrogated by a microwave field using the Ramsey method. Perturbing influences from the orbital environment on the atoms such as varying magnetic fields and the passage of the spacecraft through Earth’s radiation belt are also controlled and mitigated. With appropriate parameters settings, closed-loop locking of the CAC is realized in orbit and an estimated short-term frequency stability close to 3.0 × 10 −13 τ −1/2 has been attained. The demonstration of the long-term operation of cold atom clock in orbit opens possibility on the applications of space-based cold atom sensors." @default.
- W2866446677 created "2018-07-19" @default.
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- W2866446677 date "2018-07-24" @default.
- W2866446677 modified "2023-10-13" @default.
- W2866446677 title "In-orbit operation of an atomic clock based on laser-cooled 87Rb atoms" @default.
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- W2866446677 doi "https://doi.org/10.1038/s41467-018-05219-z" @default.
- W2866446677 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6057979" @default.
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