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Mobile quantum gravity sensor with unprecedented stability

Christian Freier ; Matthias Hauth ; Vladimir Schkolnik ; Bastian Keykauf ; Manuel Schilling ; Hartmut Wziontek ; Hans-Georg Scherneck (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium ; Institutionen för rymd- och geovetenskap, Rymdgeodesi och geodynamik) ; Jürgen Müller ; Achim Peters
Journal of Physics - Conference Series: 8th Symposium on Frequency Standards and Metrology 2015, Potsdam, Germany, 12-16 October 2015 (1742-6596). Vol. 723 (2016), 1, p. Art. no. 012050.
[Konferensbidrag, refereegranskat]

Changes of surface gravity on Earth are of great interest in geodesy, earth sciences and natural resource exploration. They are indicative of Earth system's mass redistributions and vertical surface motion, and are usually measured with falling corner-cube- and superconducting gravimeters (FCCG and SCG). Here we report on absolute gravity measurements with a mobile quantum gravimeter based on atom interferometry. The measurements were conducted in Germany and Sweden over periods of several days with simultaneous SCG and FCCG comparisons. They show the best-reported performance of mobile atomic gravimeters to date with an accuracy of 39 nm/s^2, long-term stability of 0,5 nm/s^2 and short-term noise of 96 nm/s^2/(Hz)^1/2. These measurements highlight the unique properties of atomic sensors. The achieved level of performance in a transportable instrument enables new applications in geodesy and related Fields, such as continuous absolute gravity monitoring with a single instrument under rough environmental conditions.

Nyckelord: Frequency Standards, Metrology, Atom Interferometry, Gravimetry



Denna post skapades 2016-12-14. Senast ändrad 2016-12-20.
CPL Pubid: 246112

 

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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium (2010-2017)
Institutionen för rymd- och geovetenskap, Rymdgeodesi och geodynamik (2010-2017)

Ämnesområden

Optisk fysik
Fasta jordens fysik
Övrig teknisk fysik

Chalmers infrastruktur

Onsala rymdobservatorium