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Keck Interferometer status and plans

Colavita, M. Mark and Wizinowich, Peter L. and Akeson, Rachel L. (2004) Keck Interferometer status and plans. In: New Frontiers in Stellar Interferometry. Proceedings of SPIE. No.5491. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 454-463. ISBN 9780819454232.

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Keck Interferometer is a NASA-funded project to combine the two 10 m Keck telescopes for high sensitivity near-infrared fringe visibility measurements, nulling interferometry at 10 μm to measure the quantity of exozodiacal emission around nearby stars, and differential-phase measurements to detect "hot-Jupiters" by their direct emission. It is being developed by the Jet Propulsion Laboratory, the W. M. Keck Observatory, and the Michelson Science Center. Recent activity has included formal visibility mode commissioning, as well as science observations, and we briefly review some of the significant technical aspects and updates to the system. We have also completed laboratory development of the nuller. The nuller uses two modified Mach-Zehnder input nullers, a Michelson cross combiner, and a 10 μm array camera to produce background-limited null measurements. To provide required temporal stability for the nuller, the system incorporates end-to-end laser metrology with phase referencing from two 2.2 μm fringe trackers. The nuller recently completed its pre-ship review and is being installed on the summit. After nuller integration and test, the differential phase mode will be deployed, which will use a 2-5 μm fringe detector in combination with a precision path length modulator and a vacuum delay line for dispersion control.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Wizinowich, Peter L.0000-0002-1646-442X
Akeson, Rachel L.0000-0001-9674-1564
Additional Information:© 2004 Society of Photo-optical Instrumentation Engineers (SPIE). The Keck Interferometer is funded by the National Aeronautics and Space Administration (NASA). Part of this work was performed at the Jet Propulsion Laboratory, California Institute of Technology, and at the Michelson Science Center, California Institute of Technology, under contract with NASA.
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Subject Keywords:interferometers, adaptive optics, nulling, differential phase
Series Name:Proceedings of SPIE
Issue or Number:5491
Record Number:CaltechAUTHORS:20190116-105510421
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Official Citation:M. Mark Colavita, Peter L. Wizinowich, Rachel L. Akeson, "Keck Interferometer status and plans," Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.552149
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92317
Deposited By: Tony Diaz
Deposited On:18 Jan 2019 04:19
Last Modified:16 Nov 2021 03:49

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