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Proceedings Paper

The control system for the Keck Interferometer Nuller
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Paper Abstract

The Keck Interferometer links the two 10m Keck Telescopes located atop Mauna Kea in Hawaii. It was the first 10m class, fully AO equipped interferometer to enter operation. Further, it is the first large interferometer to implement a nuller, whereby the on axis light from a bright point source (e.g. a star) can be removed interferometrically, allowing study of light from nearby, low contrast sources (e.g. exo-zodiacal dust). This paper describes the control system we have implemented to enable operation of the Keck interferometer nuller. We give a general overview of the control system, plus details of how control differs from the already implemented and operational, standard visibility science mode of the interferometer. The nuller is challenging in its requirements for control because of the necessary control precision and the complexity of the number of points of control. We have implemented some novel control methods to meet these requirements and we describe those here.

Paper Details

Date Published: 28 June 2006
PDF: 10 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62681M (28 June 2006); doi: 10.1117/12.664522
Show Author Affiliations
Andrew J. Booth, Jet Propulsion Lab. (United States)
M. Mark Colavita, Jet Propulsion Lab. (United States)
Jean I. Garcia, Jet Propulsion Lab. (United States)
Chris Koresko, Michelson Science Ctr., California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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