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Proceedings Paper

CHARA Michigan phase-tracker (CHAMP): a preliminary performance report
Author(s): David H. Berger; John D. Monnier; Rafael Millan-Gabet; Theo A. ten Brummelaar; Matthew Anderson; Jennifer L. Blum; Timothy Blasius; Ettore Pedretti; Nathalie Thureau
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Paper Abstract

The CHARA Michigan Phase-tracker (CHAMP) is a real-time fringe tracker for the CHARA Array, a six-telescope long baseline optical interferometer on Mount Wilson, California. CHAMP has been optimized for tracking sensitivity at J, H, or K bands and is not meant as a science instrument itself. This ultimately results in maximum sensitivity for all the science beam combiners that benefit from stabilized fringes. CHAMP was designed, built, and tested in the laboratory at the University of Michigan and will be delivered to the CHARA Array in 2008. We present the final design of CHAMP, highlighting some its key characteristics, including a novel post-combination transport and imaging system. We also discuss testing and validation studies and present first closed-loop operation in the laboratory.

Paper Details

Date Published: 28 July 2008
PDF: 10 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 701319 (28 July 2008); doi: 10.1117/12.790168
Show Author Affiliations
David H. Berger, Univ. of Michigan (United States)
John D. Monnier, Univ. of Michigan (United States)
Rafael Millan-Gabet, Michelson Science Ctr., California Institute of Technology (United States)
Theo A. ten Brummelaar, The CHARA Array, Mount Wilson Observatory (United States)
Matthew Anderson, Univ. of Michigan (United States)
Jennifer L. Blum, Univ. of Michigan (United States)
Timothy Blasius, Univ. of Michigan (United States)
Ettore Pedretti, Univ. of St. Andrews (United Kingdom)
Nathalie Thureau, Univ. of St. Andrews (United Kingdom)


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

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