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Proceedings Paper

Influence of atmospheric turbulence on the performance and design of GENIE
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Paper Abstract

Two competitive design studies for the Ground-based European Nulling Interferometer Experiment (GENIE) have been initiated by the European Space Agency and the European Southern Observatory in November 2003. The GENIE instrument will most probably consist of a two-telescope Bracewell interferometer, using the 8-m Unit Telescopes and/or the 1.8-m Auxiliary Telescopes of the VLTI, and working in the infrared L' band (3.5 - 4.1 microns). A critical issue affecting the overall performance of the instrument is its capability to compensate for the phase and intensity fluctuations produced by the atmospheric turbulence. In this paper, we present the basic principles of phase and intensity control by means of real-time servo loops in the context of GENIE. We then propose a preliminary design for these servo loops and estimate their performance using GENIEsim, the science simulation software for the GENIE instrument.

Paper Details

Date Published: 20 October 2004
PDF: 9 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.550441
Show Author Affiliations
Olivier Absil, Univ. de Liege (Belgium)
Roland H. den Hartog, European Space Agency/ESTEC (Netherlands)
Philippe Alain Gondoin, European Space Agency/ESTEC (Netherlands)
Pierre Fabry, European Space Agency/ESTEC (Netherlands)
Luigi L. A. d'Arcio, European Space Agency/ESTEC (Netherlands)
Rainer C. Wilhelm, European Southern Observatory (Germany)
Philippe B. Gitton, European Southern Observatory (Germany)
Florence Puech, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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