I.C.E.: a transportable atomic inertial sensor for test in microgravity
- First Online:
- 242 Downloads
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 20 s 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.
Unable to display preview. Download preview PDF.
- 1.P.R. Bermann (eds.), Atom Interferometry (Academic, Boston MA, 1997)Google Scholar
- 2.T. Sleator, P.R. Berman, B. Dubetsky, arXiv: physics/9905047 (1999)Google Scholar
- 4.Y. Le Coq, J.A. Retter, S. Richard, A. Aspect, P. Bouyer, e-print cond-mat/0501520 (2005)Google Scholar
- 12.Natural-abundance dispensers are available from SAES Getters. We are interested in the isotopes 87Rb and 40K, which are respectively 28% and 0.012% naturally abundant. We will be investing in isotopically enriched 40K (about 5%) dispensers in the near futureGoogle Scholar
- 21.Our current measurements suggest E8–E9 atoms in the cloud. Loading to nearly the maximum atom number takes less than 5 sGoogle Scholar
- 24.C.J. Bordé, in Laser Spectroscopy X, ed. by M. Ducloy, E. Giacobino, G. Camy (World Scientific, Singapore 1991), p. 239Google Scholar
- 26.G.J. Dick, Local oscillator induced instabilities. In Proc. Nineteenth Annual Precise Time and Time Interval Applications Planning Meet., 1987, pp. 133–147Google Scholar
- 27.P. Cheinet, B. Canuel, F. Pereira Dos Santos, A. Gauguet, F. Leduc, A. Landragin, e-print physics/0510197 (2005)Google Scholar
- 28.P. Cheinet, F. Pereira Dos Santos, T. Petelski, J. Le Gouët, J. Kim, K.T. Therkildsen, A. Clairon, A. Landragin, e-print physics/0510261 (2005)Google Scholar