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Proceedings Paper

Measuring space radiation impact on the characteristics of optical glasses: urement results and recommendations from testing a selected set of materials
Author(s): Michel Fruit; Andrei I. Gusarov; Dominic B. Doyle
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Paper Abstract

Radiation sensitivity of glass is a general concern for the designer of Space optical instruments. ASTRIUM, in cooperation with SCK-CEN, has conducted a study (under ESA sponsorship) to define the approach for the gathering of a comprehensive database to quantify these effects through the use of linear sensitivity coefficients (called "Dose Coefficients"). These "Dose coefficients" cover not only transmittance but also other characteristics such as refractive index. After having recalled the basics of the proposed approach, results of the first irradiation tests which have been run on a selected set of classical glasses nd their Radiation hardened Cerium doped analogs (including BK7, K5, LaK9 and other Schott glasses) will be discussed. PRotons and gamma radiation have been performed with the aim to demonstrate equivalence, thus allowing to further considering only gamma radiation for an extensive testing of available glasses. Relaxation impacts on some months period have been tentatively analyzed. All these measurements have been processed and the modeling approach of the radiations impacts has been derived, as shown in the publication from A. Gusarov at this conference. This will constitute the grounds for the building of a comprehensive "Dose Coefficients" data base, as expressed in the publication from D. Doyle also at this conference. From this, recommendations for a sound characterization of radiation impacts on refractive optical materials have been established and are the subject of this publication.

Paper Details

Date Published: 11 November 2002
PDF: 10 pages
Proc. SPIE 4823, Photonics for Space Environments VIII, (11 November 2002); doi: 10.1117/12.452255
Show Author Affiliations
Michel Fruit, Astrium SAS (France)
Andrei I. Gusarov, Faculté Polytechnique de Mons (France)
Multitel A.S.B.L. (France)
Dominic B. Doyle, European Space Agency/ESTEC (Netherlands)


Published in SPIE Proceedings Vol. 4823:
Photonics for Space Environments VIII
Edward W. Taylor, Editor(s)

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