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Proceedings Paper

Instrument description and science performance of the Far Ultraviolet Spectroscopic Explorer
Author(s): Scott D. Friedman; James C. Green; Erik Wilkinson
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Paper Abstract

The Far Ultraviolet Spectroscopic Explorer (FUSE) is an astrophysics satellite currently being designed to provide high spectral resolving power ((lambda) /(Delta) (lambda) approximately equals 30,000) observations in the interval 853 - 1248 angstrom. It consists of four co-aligned normal incidence mirrors which illuminate high density, holographically ruled diffraction gratings on spherical substrates. High resolution spectra are formed on a pair of microchannel plate detectors with KBr photocathodes and delay line anodes. A separate low dispersion channel ((lambda) /(Delta) (lambda) on the order of magnitude 500) permits observations in the extended wavelength interval 800 - 1600 angstrom with long slit spatial imaging better than 5 arcseconds. The utility of observing in the prime FUSE spectral region is due to the vastly greater number of important transitions of atoms and ions in the ultraviolet compared to the visible. This makes FUSE a powerful instrument for measuring physical parameters such as temperature, pressure, density, and abundance in a wide variety of astrophysical sites. Among the many problems FUSE will address are the deuterium abundance in the universe; the character and distribution of the components of the hot interstellar medium such as O VI which must be understood to model galactic evolution; and physical processes in the atmospheres of planets and planetary systems.

Paper Details

Date Published: 7 November 1994
PDF: 10 pages
Proc. SPIE 2283, X-Ray and Ultraviolet Spectroscopy and Polarimetry, (7 November 1994); doi: 10.1117/12.193180
Show Author Affiliations
Scott D. Friedman, Johns Hopkins Univ. (United States)
James C. Green, Univ. of Colorado/Boulder (United States)
Erik Wilkinson, Univ. of Colorado/Boulder (United States)

Published in SPIE Proceedings Vol. 2283:
X-Ray and Ultraviolet Spectroscopy and Polarimetry
Silvano Fineschi, Editor(s)

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