28 July 2008 CHARA Michigan phase-tracker (CHAMP): a preliminary performance report
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David H. Berger, David H. Berger, John D. Monnier, John D. Monnier, Rafael Millan-Gabet, Rafael Millan-Gabet, Theo A. ten Brummelaar, Theo A. ten Brummelaar, Matthew Anderson, Matthew Anderson, Jennifer L. Blum, Jennifer L. Blum, Timothy Blasius, Timothy Blasius, Ettore Pedretti, Ettore Pedretti, Nathalie Thureau, Nathalie Thureau, } "CHARA Michigan phase-tracker (CHAMP): a preliminary performance report", Proc. SPIE 7013, Optical and Infrared Interferometry, 701319 (28 July 2008); doi: 10.1117/12.790168; https://doi.org/10.1117/12.790168

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