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Proceedings Paper • Open Access

Investigation of laser induced deposit formation under space conditions
Author(s): H. Schröder; S. Borgmann; W. Riede; Denny Wernham

Paper Abstract

In this paper comprehensive investigations of laser induced deposit formation are reported. In a high vacuum chamber (p < 10-6 mbar) different space relevant materials containing epoxy, silicone and polyurethane based components were tested under space conditions. The experiments were performed with a pulsed Nd:YAG laser with peak fluences up to 2.5 J/cm2 at 355 nm wavelength and 3 ns pulse width. Additional tests were performed with an UV cw laser diode at 375 nm and 10 mW mean power. The onset and growth of the deposits was monitored in-situ and online by UV induced fluorescence imaging. The influence of roughness, temperature and chemical composition of the optical surface on the deposition process was investigated. Time-of-flight secondary ion mass spectroscopy (ToF-SIMS) was used for chemical characterization of the deposits. Furthermore the influence of deposits on the UV-transmission of the optics was estimated.

Paper Details

Date Published: 21 November 2017
PDF: 6 pages
Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 105661K (21 November 2017); doi: 10.1117/12.2308207
Show Author Affiliations
H. Schröder, German Aerospace Ctr. (Germany)
S. Borgmann, German Aerospace Ctr. (Germany)
W. Riede, German Aerospace Ctr. (Germany)
Denny Wernham, European Space Research and Technology Ctr. (Netherlands)

Published in SPIE Proceedings Vol. 10566:
International Conference on Space Optics — ICSO 2008
Josiane Costeraste; Errico Armandillo; Nikos Karafolas, Editor(s)

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