Influence of atmospheric turbulence on the performance and design of GENIE

  • Absil O
  • den Hartog R
  • Gondoin P
  • et al.
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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 2003.1 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 μm). 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.2 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.3.

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Absil, O., den Hartog, R. H., Gondoin, P. A., Fabry, P., d’Arcio, L. L. A., Wilhelm, R. C., … Puech, F. (2004). Influence of atmospheric turbulence on the performance and design of GENIE. In New Frontiers in Stellar Interferometry (Vol. 5491, p. 1257). SPIE. https://doi.org/10.1117/12.550441

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