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Proceedings Paper

Rate of long-term bleaching in FK 51 optical glass darkened by Co60 ionizing radiation at dose rates of 10 krad/hr and 7rad/hr
Author(s): G. Richard Wirtenson; Richard H. White
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Paper Abstract

A previous paper presented long term bleaching data on various glasses exposed to 10.6 krad of ionizing radiation. All the glasses mported except FK 51 have readily available "G" glass equivalents that are stabilized to the natural space environment. Yet, FK 51, because of its location on the Abbe diagram is extremely useful in certain lens design applications. To more fully explore the bleaching ofFK 51, after the initial dose of 10.6 had at 1 1.8 krad/hour, we inadiated three more samples at a similar dose rate but to different total doses. Since the dose rate for this study was significantly higher than the dose rate anticipated for glasses in a shielded space-based lens system (-3 md/day), additional data wei obtained at a lower rate of 7 md/hour. While this dose rate is still higher than the anticipated operational rate, it is more than 1000 times lower than the dose rate used for our initial studies. The bleaching rate for the samples exposed at the lower dose rate is considerably less than for the samples exposed at the higher rate.

Paper Details

Date Published: 17 October 1997
PDF: 6 pages
Proc. SPIE 3124, Photonics for Space Environments V, (17 October 1997); doi: 10.1117/12.279016
Show Author Affiliations
G. Richard Wirtenson, Lawrence Livermore National Lab. (United States)
Richard H. White, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 3124:
Photonics for Space Environments V
Edward W. Taylor, Editor(s)

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