The DESI fiber positioner system
Schubnell, Michael; Ameel, Jon; Besuner, Robert W.; Gershkovich, Irena; Heetderks, Henry D.; Horler, Philipp; Kneib, Jean-Paul; Heetderks, Henry D.; Silber, Joseph H.; Tarle, Gregory; Weaverdyck, Curtis
2016

Abstract

The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the baryon acoustic oscillation technique. A new prime focus corrector for the KPNO Mayall telescope will deliver light to 5,000 fiber optic positioners feeding ten broad-band spectrographs. The positioners have eccentric axis kinematics. Actuation is provided by two 4 mm diameter DC brushless gear-motors. An attached electronics board accepts a DC voltage for power and CAN messages for communications and drives the two motors. The positioner accepts the ferrulized and polished fiber and provides a mechanically safe path through its internal mechanism. Positioning is rapid and accurate with typical RMS errors of less than 5 mu m.

Details

Title The DESI fiber positioner system
Author(s) Schubnell, Michael ; Ameel, Jon ; Besuner, Robert W. ; Gershkovich, Irena ; Heetderks, Henry D. ; Horler, Philipp ; Kneib, Jean-Paul ; Heetderks, Henry D. ; Silber, Joseph H. ; Tarle, Gregory ; Weaverdyck, Curtis
Published in Ground-Based And Airborne Instrumentation For Astronomy Vi
Pagination 6
Editor(s)
Series Proceedings of SPIE
Volume 9908
Pages 990892
Conference Conference on Ground-Based and Airborne Instrumentation for Astronomy VI, Edinburgh, SCOTLAND, JUN 26-30, 2016
Date 2016
Publisher Bellingham, Spie-Int Soc Optical Engineering
ISSN 0277-786X
ISBN 978-1-5106-0196-3
Keywords
DOI https://doi.org/10.1117/12.2233370
Other identifier(s) View record in Web of Science
Laboratories LASTRO
Record Appears in Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LASTRO - Laboratory of Astrophysics
Peer-reviewed publications
Conference Papers
Work produced at EPFL
Published
Record creation date 2017-02-17

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