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Proceedings Paper

Fiber coupled high-resolution infrared array spectrometer for the Kuiper Airborne Observatory
Author(s): David Alan Glenar; Dennis C. Reuter; M. J. Mumma; Gordon Chin; Guenter R. Wiedemann; Donald E. Jennings; Katherine A. Forrest; Harold A. Weaver Jr.
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Paper Abstract

A novel cryogenic grating spectrometer (FCAS) is being designed for observations of volatiles in cometary and planetary atmospheres, and in newly forming planetary systems. The instrument features two-dimensional detector arrays coupled to a high-dispersion echelle by infrared fibers, and will achieve a spectral resolving power of about 40,000. The primary observational platform for this instrument will be the Kuiper Airborne Observatory, but it will also be configured for use at ground-based observatories. Initially, the spectrometer will use a 58 x 62, 1- to 5-micron InSb array. Larger-format IR arrays and arrays of different composition, will later be incorporated as they become available. The instrument will be used in two modes. The first uses a large format IR array in the spectral image plane for the customary one-dimensional spectral-one-dimensional spatial coverage. In the second mode, a massive, coherent bundle of infrared transmitting ZrF4 fibers will be installed after the dispersive element, to reformat the two-dimensional array into an elongated one-dimensional array for wide spectral coverage, allowing multiple lines to be measured in a single integration with high sensitivity. The overall instrument design is discussed, and the system sensitivity is estimated.

Paper Details

Date Published: 1 July 1990
PDF: 14 pages
Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); doi: 10.1117/12.19071
Show Author Affiliations
David Alan Glenar, NASA/Goddard Space Flight Ctr. (United States)
Dennis C. Reuter, NASA/Goddard Space Flight Ctr. (United States)
M. J. Mumma, NASA/Goddard Space Flight Ctr. (United States)
Gordon Chin, NASA/Goddard Space Flight Ctr. (United States)
Guenter R. Wiedemann, NASA/Goddard Space Flight Ctr. and National Research Council (Germany)
Donald E. Jennings, NASA/Goddard Space Flight Ctr. (United States)
Katherine A. Forrest, NASA/Goddard Space Flight Ctr. (United States)
Harold A. Weaver Jr., Space Telescope Science Institute (United States)

Published in SPIE Proceedings Vol. 1235:
Instrumentation in Astronomy VII
David L. Crawford, Editor(s)

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