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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 421512.0, MPI für Astronomie / Publikationen_mpia
The ESPRI Project: differential delay lines for PRIMA
Authors:Pepe, F.; Queloz, D.; Henning, Th; Quirrenbach, A.; Delplancke, F.; Andolfato, L.; Baumeister, H.; Bizenberger, P.; Bleuler, H.; Chazelas, B.; Dérie, F.; Di Lieto, L.; Duc, T. P.; Duvanel, O.; Fleury, M.; Gillet, D.; Graser, U.; Koch, F.; Launhardt, R.; Maire, C.; Mégevand, D.; Michellod, Y.; Moresmau, J. M.; Müllhaupt, P.; Naranjo, V.; Sache, L.; Salvadé, Y.; Simond, G.; Sosnowska, D.; Wagner, K.; Zago, L.
Place of Publication:Bellingham, Wash.
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:Optical and Infrared Interferometry
Start Page:70130P
End Page:12
Title of Series:SPIE
Volume (in Series):7013
Name of Conference/Meeting:Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
Review Status:not specified
Audience:Experts Only
Abstract / Description:ESPRI is a project which aims at searching for and characterizing extra-solar planets by dual-beam astrometry with PRIMA@VLTI. Differential Delay Lines (DDL) are fundamental for achieving the micro-arcseconds accuracy required by the scientific objective. Our Consortium, consisting of the Geneva Observatory, the Max-Planck Institut for Astronomy Heidelberg, and the Landessternwarte Heidelberg, in collaboration with ESO, has built and tested these DDLs successfully and will install them in summer 2008 at the VLTI. These DDLs consist of high quality cat's eyes displaced on a parallel beam-mechanics and by means of a two-stage actuation with a precision of 5 nm over a stroke length of 70 mm. Over the full range, a bandwidth of about 400 Hz is achieved. The DDLs are operated in vacuum. We shall present, in this paper, their design and their exceptional performances.
Comment of the Author/Creator:Date: 2008, July 1, 2008
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008SPIE.7013E..21P [ID No:1]
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