Investigation of Laser Induced Deposit Formation under Space Conditions
Schröder, Helmut and Borgmann, Sandra and Riede, Wolfgang and Wernham, Denny (2008) Investigation of Laser Induced Deposit Formation under Space Conditions. In: Proceedings ICSO 2008. Seventh International Conference on Space Optics, 2008-10-14 - 2008-10-17, Toulouse, France.
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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.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Investigation of Laser Induced Deposit Formation under Space Conditions|
|Journal or Publication Title:||Proceedings ICSO 2008|
|In ISI Web of Science:||No|
|Keywords:||Laser induced contamination, fluorescence|
|Event Title:||Seventh International Conference on Space Optics|
|Event Location:||Toulouse, France|
|Event Type:||international Conference|
|Event Dates:||2008-10-14 - 2008-10-17|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L AR - Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Laser Research and Technology|
|Institutes and Institutions:||Institute of Technical Physics|
|Deposited By:||Dr.rer.nat. Helmut Schröder|
|Deposited On:||08 Dec 2008|
|Last Modified:||27 Apr 2009 15:32|
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