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Proceedings Paper

The ESPRI Project: differential delay lines for PRIMA
Author(s): F. Pepe; D. Queloz; Th. Henning; A. Quirrenbach; F. Delplancke; L. Andolfato; H. Baumeister; P. Bizenberger; H. Bleuler; B. Chazelas; F. Dérie; L. Di Lieto; T. P. Duc; O. Duvanel; M. Fleury; D. Gillet; U. Graser; F. Koch; R. Launhardt; C. Maire; D. Mégevand; Y. Michellod; J.-M. Moresmau; P. Müllhaupt; V. Naranjo; L. Sache; Y. Salvadé; G. Simond; D. Sosnowska; K. Wagner; L. Zago
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Paper Abstract

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.

Paper Details

Date Published: 28 July 2008
PDF: 12 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 70130P (28 July 2008); doi: 10.1117/12.788169
Show Author Affiliations
F. Pepe, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
D. Queloz, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
Th. Henning, Max Planck Institute for Astronomy (Germany)
A. Quirrenbach, Landessternwarte Königstuhl (Germany)
F. Delplancke, European Southern Observatory (Germany)
L. Andolfato, European Southern Observatory (Germany)
H. Baumeister, Max Planck Institute for Astronomy (Germany)
P. Bizenberger, Max Planck Institute for Astronomy (Germany)
H. Bleuler, Ecole Polytechnique Fédérale, Lab. de Systèmes Robotiques (Switzerland)
B. Chazelas, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
F. Dérie, European Southern Observatory (Germany)
L. Di Lieto, European Southern Observatory (Germany)
T. P. Duc, European Southern Observatory (Germany)
O. Duvanel, Ecole d'ingénieur ARC (Switzerland)
M. Fleury, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
D. Gillet, Ecole Polytechnique Fédérale, Lab. d'Automatique (Switzerland)
U. Graser, Max Planck Institute for Astronomy (Germany)
F. Koch, European Southern Observatory (Germany)
R. Launhardt, Max Planck Institute for Astronomy (Germany)
C. Maire, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
D. Mégevand, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
Y. Michellod, Ecole Polytechnique Fédérale, Lab. d'Astrophysique (Switzerland)
J.-M. Moresmau, European Southern Observatory (Germany)
P. Müllhaupt, Ecole Polytechnique Fédérale, Lab. d'Astrophysique (Switzerland)
V. Naranjo, Max Planck Institute for Astronomy (Germany)
L. Sache, Ecole Polytechnique Fédérale, Lab. de Systèmes Robotiques (Switzerland)
Y. Salvadé, Ecole d'ingénieur ARC (Switzerland)
G. Simond, Observatoire Astronomique de l'Univ. de Genève (Switzerland)
D. Sosnowska, Ecole Polytechnique Fédérale, Lab. d'Astrophysique (Switzerland)
K. Wagner, Max Planck Institute for Astronomy (Germany)
L. Zago, Ctr. Suisse d'Electronique et Microtechnique (Switzerland)


Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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