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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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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.

Document Type:Conference or Workshop Item (Paper)
Title:Investigation of Laser Induced Deposit Formation under Space Conditions
Authors:
AuthorsInstitution or Email of Authors
Schröder, HelmutUNSPECIFIED
Borgmann, SandraUNSPECIFIED
Riede, WolfgangUNSPECIFIED
Wernham, DennyESA ESTEC
Date:2008
Journal or Publication Title:Proceedings ICSO 2008
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
CNES, UNSPECIFIED
ESA, UNSPECIFIED
Status:Published
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
Organizer:CNES ESA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology
Location: Stuttgart
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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