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Proceedings Paper

Effects of simulated space proton environment on transmission of optical materials for the space telescope imaging spectrograph (STIS)
Author(s): Jacob Becher; Walter B. Fowler
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Paper Abstract

Potential transmitting materials for the STIS mission are being considered for order sorters, in-flight calibration filters, detector windows and calibration lamps. In this paper we examine the changes in spectral transmission characteristics with radiation dosage during a mission lifetime. A radiation environment for a 593 km altitude, 28 degree inclination orbit, for solar minimum and solar maximum, assuming a spherical shielding of 2 gms/cm2 has been assumed. The dosage for protons is 0.392 Krad (Al)/Yr. and 0.217 Krad (Al)/Yr. for solar minimum and solar maximum respectively. To simulate the mission radiation environment Harvard Cyclotron Laboratory (HCL) has been used. Spectral transmission was measured between 210 nm and 3200 nm using a Perkin Elmer Lambda 9 monochromator. Below 210 nm a one meter McPherson vacuum monochromator was used. Transmission curves for all samples were obtained before irradiation and compared for equality in transmission.

Paper Details

Date Published: 1 October 1993
PDF: 12 pages
Proc. SPIE 2019, Infrared Spaceborne Remote Sensing, (1 October 1993); doi: 10.1117/12.157843
Show Author Affiliations
Jacob Becher, Old Dominion Univ. (United States)
Walter B. Fowler, Old Dominion Univ. (United States)

Published in SPIE Proceedings Vol. 2019:
Infrared Spaceborne Remote Sensing
Marija S. Scholl, Editor(s)

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