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Proceedings Paper

VLT interferometer: preparation for first fringes
Author(s): Philippe B. Gitton; Bertrand Koehler; Samuel A. Leveque; Andreas Glindemann
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Paper Abstract

With its `first fringe' milestone planned within a year the VLT Interferometer (VLTI) has entered a phase where it becomes possible to have a preliminary validation of its system performance by combining results of tests obtained at sub-system level. This is also the time for a careful planning of integration and commissioning activities. After an overview of the system approach used in the course of the VLTI project to predict and control the system performance, we present the results of the last crucial tests done on the thermal behavior of the underground, air-filled Delay Line Tunnel. These results have enabled to validate the early assumptions made on the effects of internal air turbulence (so called `internal seeing'). Finally, the last section presents the basic approach to the integration and commissioning of the VLTI to start this year at Paranal.

Paper Details

Date Published: 2 August 2000
PDF: 12 pages
Proc. SPIE 4004, Telescope Structures, Enclosures, Controls, Assembly/Integration/Validation, and Commissioning, (2 August 2000); doi: 10.1117/12.393918
Show Author Affiliations
Philippe B. Gitton, European Southern Observatory (Germany)
Bertrand Koehler, European Southern Observatory (Germany)
Samuel A. Leveque, European Southern Observatory (Germany)
Andreas Glindemann, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 4004:
Telescope Structures, Enclosures, Controls, Assembly/Integration/Validation, and Commissioning
Thomas A. Sebring; Torben Andersen, Editor(s)

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