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Proceedings Paper

Ultraviolet scattering by thin carbon foils
Author(s): Richard R. Zito
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Paper Abstract

Characterization of the transmission and scattering of ultraviolet light through thin carbon foils is central to the operation of high-energy neutral atom (HENA) images. When unwanted external UV enters a HENA imager through its carbon foil window, some of this radiation is scattered toward the internal side mounted detectors. These detectors may then produce a 'false count' which is unrelated to any neutral particle inspection. It is against the background of ultraviolet produced false counts that the true counts of high-energy neutral particles must be made. This report describes the UV transmission and scattering through thin carbon foils at the Lyman-(alpha) wavelength of 1216 angstroms; the dominant ultraviolet wavelength in the solar system. The films tested were flight hardware from the HENA imager of the IMAGE (Imager for Magnetopause-to-Aurora Global Exploration) spacecraft. The imager ultimately produces a two dimensional map by measuring the neutral atom flux in different directions. The IMAGE spacecraft is scheduled for launch on Jan 1, 2000. A twin HENA was also placed aboard the Cassini mission to Saturn spacecraft, which was successfully launched on Dec. 5, 1997.

Paper Details

Date Published: 30 October 1998
PDF: 11 pages
Proc. SPIE 3426, Scattering and Surface Roughness II, (30 October 1998); doi: 10.1117/12.328464
Show Author Affiliations
Richard R. Zito, Richard R. Zito R & D Corp. (United States)

Published in SPIE Proceedings Vol. 3426:
Scattering and Surface Roughness II
Zu-Han Gu; Alexei A. Maradudin, Editor(s)

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