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Proceedings Paper

iSHELL: a construction, assembly and testing
Author(s): John Rayner; Alan Tokunaga; Dan Jaffe; Morgan Bonnet; Greg Ching; Mike Connelley; Dan Kokubun; Charles Lockhart; Eric Warmbier
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Paper Abstract

iSHELL is 1.10-5.3 μm high spectral resolution spectrograph being built for the NASA Infrared Telescope Facility on Maunakea, Hawaii. Dispersion is accomplished with a silicon immersion grating in order to keep the instrument small enough to be mounted at the Cassegrain focus of the telescope. The white pupil spectrograph produces resolving powers of up to R=75,000. Cross-dispersing gratings mounted in a tilt-able mechanism allow observers to select different wavelength ranges and, in combination with a slit wheel and Dekker mechanism, slit lengths ranging from 5ʺ″ to 25ʺ″. One Teledyne 2048x2048 Hawaii 2RG array is used in the spectrograph, and one Raytheon 512x512 Aladdin 2 array is used in a slit viewer for object acquisition and guiding. First light is expected in mid-2016. In this paper we discuss details of the construction, assembly and laboratory testing.

Paper Details

Date Published: 9 August 2016
PDF: 17 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990884 (9 August 2016); doi: 10.1117/12.2232064
Show Author Affiliations
John Rayner, Univ. of Hawai'i (United States)
Alan Tokunaga, Univ. of Hawai'i (United States)
Dan Jaffe, The Univ. of Texas at Austin (United States)
Morgan Bonnet, Univ. of Hawai'i (United States)
Greg Ching, Univ. of Hawai'i (United States)
Mike Connelley, Univ. of Hawai'i (United States)
Dan Kokubun, Oceanit (United States)
Charles Lockhart, Univ. of Hawai'i (United States)
Eric Warmbier, Univ. of Hawai'i (United States)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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