Testing gravity with cold-atom clocks in space: The ACES mission

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00342055" target="_blank" >RIV/68407700:21340/20:00342055 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1140/epjd/e2020-10167-7" target="_blank" >https://doi.org/10.1140/epjd/e2020-10167-7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjd/e2020-10167-7" target="_blank" >10.1140/epjd/e2020-10167-7</a>

Result language
angličtina
Original language name
Testing gravity with cold-atom clocks in space: The ACES mission
Original language description
Atomic Clock Ensemble in Space (ACES) is a mission designed to test Einstein’s theory of General Relativity from the International Space Station (ISS). A primary frequency standard based on laser cooled caesium atoms (PHARAO) and an active H-maser (SHM) generate a clock signal that is distributed to a network of clocks on the ground to perform space-to-ground comparison. With a fractional frequency stability of 1x10-16 after 10 days of integration time and an accuracy of 1-2x10-16 , ACES will provide an absolute measurement of the gravitational redshift, it will search for time variations of fundamental constant, and perform Standard Model Extension (SME) tests. The ACES payload is currently completing its qualification tests before flying. The mission status, the latest test results, and the ACES performance for testing General Relativity are discussed.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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