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International Conference on Space Optics — ICSO 2006

DOI: 10.1117/12.2308089

Springer (part of Springer Nature), Applied Physics B: Lasers and Optics, 4(84), p. 673-681

DOI: 10.1007/s00340-006-2395-7

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I.C.E.: a Transportable Atomic Inertial Sensor for Test in Microgravity

Journal article published in 2006 by Robert A. Nyman, Gaël Varoquaux ORCID, Fabien Lienhart, Damien Chambon, Salah Boussen, Jean-François Clément, T. Muller, Giorgio Santarelli, Frank Pereira Dos Santos ORCID, André Clairon, Alexandre Bresson, Arnaud Landragin, Philippe Bouyer, Frank Pereira Dos Santos
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We present the construction of an atom interferometer for inertial sensing in microgravity, as part of the I.C.E. (Interférométrie Cohérente pour l’Espace) collaboration. On-board laser systems have been developed based on fibre-optic components, which are insensitive to mechanical vibrations and acoustic noise, have sub-MHz line width, and remain frequency stabilised for weeks at a time. A compact, transportable vacuum system has been built, and used for laser cooling and magneto-optical trapping. We will use a mixture of quantum degenerate gases, bosonic 87Rb and fermionic 40K, in order to find the optimal conditions for precision and sensitivity of inertial measurements. Microgravity will be realised in parabolic flights lasting up to 20s in an Airbus. We investigate the experimental limits of our apparatus, and show that the factors limiting the sensitivity of a long-interrogation-time atomic inertial sensor are the phase noise in reference-frequency generation for Raman-pulse atomic beam splitters and acceleration fluctuations during free fall.