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Proceedings Paper

Proton radiation testing of laser optical components for NASA Jupiter Europa Orbiter Mission
Author(s): W. Joe Thomes; John F. Cavanaugh; Melanie N. Ott
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Paper Abstract

The Jupiter Europa Orbiter (JEO) is NASA's element of the joint Europa Jupiter System Mission (EJSM). Based on current trajectories, the spacecraft will spend a significant amount of time in the Jovian radiation belts. Therefore, research endeavors are underway to study the radiation effects on the various parts and components needed to implement the instruments. Data from these studies will be used for component selection and system design to ensure reliable operation throughout the mission duration. The radiation environment en route to Jupiter is nothing new for NASA designed systems, however, the long durations orbiting Jupiter and Europa present new challenges for radiation exposure. High-energy trapped electrons and protons at Jupiter dominate the expected radiation environment. Therefore, most of the initial component level radiation testing is being conducted with proton exposure. In this paper we will present in-situ monitoring of the optical transmission of various laser optical components during proton irradiation. Radiation induced optical attenuation of some components is less than would be expected, based on the authors experiences, and is attributed to the interaction of the protons with the materials. The results are an encouraging first step in screening these optical materials for spaceflight in a high radiation environment.

Paper Details

Date Published: 13 September 2011
PDF: 10 pages
Proc. SPIE 8164, Nanophotonics and Macrophotonics for Space Environments V, 816403 (13 September 2011); doi: 10.1117/12.895816
Show Author Affiliations
W. Joe Thomes, NASA Goddard Space Flight Ctr. (United States)
John F. Cavanaugh, NASA Goddard Space Flight Ctr. (United States)
Melanie N. Ott, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8164:
Nanophotonics and Macrophotonics for Space Environments V
Edward W. Taylor; David A. Cardimona, Editor(s)

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