Riede, Wolfgang und Allenspacher, Paul und Schröder, Helmut und Wernham, Denny und Lien, Yngve (2006) Laser-induced hydrocarbon contamination in vacuum. In: Boulder Damage Symposium, 37, 59910H-1-59910H-13. SPIE. 37th Annual Boulder Damage Symposium, 2005-09-19, Boulder, CO (USA). ISBN 0-8194-6013-3 ISSN 0277-786X
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Kurzfassung
We investigated laser-induced deposition processes on BK7 substrates under the influence of pulsed Q-switched Nd:YAG laser radiation, starting from small toluene partial pressures in a background vacuum environment. The composition and structure of the deposit was analyzed using microscopic methods like Nomarski DIC, dark-field and white-light interference microscopy, TEM, EDX and XPS. We found a distinct threshold for deposition built-up dependant on the partial pressure of toluene (0.2 J/cm2 at 0.1 mbar, 0.8 J/cm2 at 0.01 mbar toluene). The deposits strictly followed the spherical geometry of the laser spot. No deposit accumulated on MgF2 AR coated BK7 samples even at high toluene partial pressures. The onset of deposit was accompanied by periodic surface ripples formation. EDX and XPS analysis showed a carbon-like layer which strongly absorbed the 1 µm laser radiation. The typical number of shots applied was 50 000. In addition, long term lifetime tests of more than 5 Mio. shots per site were run.
Dokumentart: | Konferenzbeitrag (Vortrag, Paper) | ||||||||||||||||||
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Titel: | Laser-induced hydrocarbon contamination in vacuum | ||||||||||||||||||
Autoren: |
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Datum: | 2006 | ||||||||||||||||||
Erschienen in: | Boulder Damage Symposium | ||||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||||
In Open Access: | Nein | ||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||
Band: | 37 | ||||||||||||||||||
Seitenbereich: | 59910H-1-59910H-13 | ||||||||||||||||||
Herausgeber: |
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Verlag: | SPIE | ||||||||||||||||||
Name der Reihe: | Laser-Induced Damage in Optical Materials | ||||||||||||||||||
ISSN: | 0277-786X | ||||||||||||||||||
ISBN: | 0-8194-6013-3 | ||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||
Stichwörter: | Laser-induced contamination, aromatic hydrocarbons, lifetime tests, vacuum chamber, toluene partial pressure. | ||||||||||||||||||
Veranstaltungstitel: | 37th Annual Boulder Damage Symposium | ||||||||||||||||||
Veranstaltungsort: | Boulder, CO (USA) | ||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||
Veranstaltungsdatum: | 2005-09-19 | ||||||||||||||||||
HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||
HGF - Programmthema: | Starrflügler (alt) | ||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||
DLR - Forschungsgebiet: | L AR - Starrflüglerforschung | ||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Laserforschung und -technologie (alt) | ||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Physik | ||||||||||||||||||
Hinterlegt von: | Riede, Wolfgang | ||||||||||||||||||
Hinterlegt am: | 30 Mär 2006 | ||||||||||||||||||
Letzte Änderung: | 27 Apr 2009 05:05 |
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