Journal
NATIONAL SCIENCE REVIEW
Volume 7, Issue 12, Pages 1828-1836Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwaa215
Keywords
cold atom clock; in orbit; microgravity; fundamental physics
Categories
Funding
- China Manned Space Engineering Office
- Chinese Academy of Sciences
- National Key R&D Program of China [2016YFA0301504]
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Atomic clocks with cold atoms play important roles in the field of fundamental physics as well as primary frequency standards. Operating such cold atom clocks in space paves the way for further exploration in fundamental physics, for example dark matter and general relativity. We developed a space cold atom clock (SCAC), which was launched into orbit with the Space Lab TG-2 in 2016. Before it deorbited with TG-2 in 2019, the SCAC had been working continuously for almost 3 years. During the period in orbit, many scientific experiments and engineering tests were performed. In this article, we summarize the principle, development and in-orbit results. These works provide the basis for construction of a space-borne time-frequency system in deep space.
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