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DESI fiber positioner testing and performance (Conference Presentation)
Author(s): Michael Schubnell; Jessica Aguilar ; Jon Ameel; Stefane Caseiro; Kevin Fanning; Brandon Freudenstein; Irena Gershkovich; Henry Heetderks; Philipp Hörler; Daniela Leitner; Michael Levi; Joseph Silber; Zhiquan Sun; Gregory Tarlé; Curtis Weaverdyck; Kai Zhang; David Brooks

Paper Abstract

The Dark Energy Spectroscopic Instrument (DESI) is under construction to determine the expansion history of the Universe using the Baryon Acoustic Oscillation technique. Over the life of the experiment DESI will measure the spectra of 35 million galaxies and quasars over 14,000 square degrees out to a redshift of 3.5. A new prime focus corrector for the KPNO Mayall telescope will deliver light to 5,000 robotic fiber positioners located at the prime focus. The fibers in turn will feed ten broad-band spectrographs covering the wavelength range from 360nm to 980 nm. Rapid and accurate targeting of the fibers is provided by precision theta-phi robotic fiber positioners. The fiber positioners are manufactured at the University of Michigan. Following assembly each positioner passes through a burn-in and verification sequence. We describe the testing of the positioners and discuss the performance achieved.

Paper Details

Date Published: 10 July 2018
PDF: 8 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107062A (10 July 2018); doi: 10.1117/12.2311573
Show Author Affiliations
Michael Schubnell, Univ. of Michigan (United States)
Jessica Aguilar , Lawrence Berkeley National Lab. (United States)
Jon Ameel, Univ. of Michigan (United States)
Stefane Caseiro, Ecole Polytechnique Fédérale de Lausanne (France)
Kevin Fanning, Univ. of Michigan (United States)
Brandon Freudenstein, Univ. of Michigan (United States)
Irena Gershkovich, Univ. of Michigan (United States)
Henry Heetderks, Lawrence Berkeley National Lab. (United States)
Philipp Hörler, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Daniela Leitner, Lawrence Berkeley National Lab. (United States)
Michael Levi, Lawrence Berkeley National Lab. (United States)
Joseph Silber, Lawrence Berkeley National Lab. (United States)
Zhiquan Sun, Univ. of Michigan (United States)
Gregory Tarlé, Univ. of Michigan (United States)
Curtis Weaverdyck, Univ. of Michigan (United States)
Kai Zhang, Lawrence Berkeley National Lab. (United States)
David Brooks, Univ.College London (United Kingdom)


Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

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