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12 July 2023 Molecular contamination testing with continuous-wave laser radiation at 1064 nm: de-risking activity for the LISA space mission
Nils Bartels, Franz Hadinger, Gabriele Taube, Wolfgang Riede, Christian Dahl, Kai-Cristian Voss, Alessandra Ciapponi, Ricardo Martins, Linda Mondin
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Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 127774N (2023) https://doi.org/10.1117/12.2690854
Event: International Conference on Space Optics — ICSO 2022, 2022, Dubrovnik, Croatia
Abstract
We investigate effects of laser-induced contamination (LIC) with contaminant materials and laser parameters relevant for the LISA space mission. To accelerate outgassing and a possible deposit formation, the contaminant materials have been heated to a temperature of up to 100 °C (nominal operating temperature of 20° C), and LIC tests were performed with a laser power density of up to 300 W/cm2 (to be compared with expected 125 W/cm2). Neither in-situ measurements (laser transmission, polarization and wavefront), nor a careful microscopic inspection of the optical surfaces after the LIC tests showed indications of a laser-induced deposit formation. Condensation on optical surfaces could be observed. This is cautiously encouraging for LISA and indicates that the LIC concern may be reduced compared to what observed at shorter wavelength or with pulsed laser radiation. Additional presentation content can be accessed on the supplemental content page.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Nils Bartels, Franz Hadinger, Gabriele Taube, Wolfgang Riede, Christian Dahl, Kai-Cristian Voss, Alessandra Ciapponi, Ricardo Martins, and Linda Mondin "Molecular contamination testing with continuous-wave laser radiation at 1064 nm: de-risking activity for the LISA space mission", Proc. SPIE 12777, International Conference on Space Optics — ICSO 2022, 127774N (12 July 2023); https://doi.org/10.1117/12.2690854
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KEYWORDS
Wavefronts
Contamination
Nanoimprint lithography
Space operations
Wavefront sensors
Astronomical imaging
Laser radiation
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