Reference : Conceptual design of the ALADDIN Antarctic nulling interferometer
Scientific congresses and symposiums : Paper published in a book
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/109765
Conceptual design of the ALADDIN Antarctic nulling interferometer
English
Barillot, Marc [Alcatel Alenia Space (France)]
Courteau, Pascal [Alcatel Alenia Space (France)]
Absil, Olivier mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Coudé du Foresto, Vincent [Observatoire de Paris-LESIA (France)]
Swain, Mark [Max-Planck-Institut für Astronomie (Germany)]
1-Jul-2006
Advances in Stellar Interferometry
Monnier, John
Schöller, Markus
Danchi, William
SPIE
Proceedings of the SPIE, volume 6268
2Z.1-2Z.8
No
No
International
Bellingham
WA
Advances in Stellar Interferometry
du 24 au 31 mai 2006
SPIE
Orlando
FL
[en] It is commonly accepted that highly challenging planet finding missions such as Darwin and TPF need precursors on the ground, for both technological demonstration and study of the exozodiacal clouds around potential targets. A first instrument, GENIE, designed to be implemented in the interferometric laboratory of the VLTI, was studied by ESA and scientific/industrial teams. In this paper we present a concept for ALADDIN, an operational nulling instrument to be implemented at Dome C in Antarctica, and discuss the comparison with GENIE from the instrumental point of view. Our preliminary design involves moderate ~1m size telescopes mounted on a 40m long rotating beam allowing baselines up to 30m and feeding a 2-arm nulling beam combiner. When compared to GENIE, the rotating beam design has the advantage of removing the need for both long-stroke delay line and dispersion control equipments. As a side effect, the instrumental arrangement of ALADDIN finds itself more representative of what Darwin will be. Furthermore, critical issues like phase control, photometric balance and instrumental background suppression are expected to be relaxed by the improved atmospheric conditions, lower temperature, and simpler optical trains. Calibration of geometrical stellar leakage will make advantage of the continuously adjustable baseline. As results, a simpler instrument showing improved performance is expected. In conclusion, we see our ALADDIN concept as a valuable alternative to GENIE, with a quite stronger scientific potential and a considerably simplified instrumental design.
Researchers
http://hdl.handle.net/2268/109765
10.1117/12.671722
http://adsabs.harvard.edu/abs/2006SPIE.6268E..94B
Copyright 2006 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

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