Expansion phenomena of aerosols generated by laser ablation under helium and argon atmosphere

Specific expansion phenomena of aerosols generated by near infrared femtosecond laser ablation (NIR-fs-LA) of brass under helium and argon atmosphere were studied. For this purpose, particles were visualized by light scattering using a pulsed laser source. Aerosols were found to be captured in symme...

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Bibliographic Details
Published inSpectrochimica acta. Part B: Atomic spectroscopy Vol. 63; no. 1; pp. 37 - 41
Main Authors Koch, J., Wälle, M., Schlamp, S., Rösgen, T., Günther, D.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2008
Subjects
Aerosol transportation
Femtosecond laser ablation
Inductively coupled plasma mass spectrometry
Laser-induced scattering
Visualization
Femtosecond laser ablation
Visualization
Laser-induced scattering
Inductively coupled plasma mass spectrometry
Aerosol transportation
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Summary:Specific expansion phenomena of aerosols generated by near infrared femtosecond laser ablation (NIR-fs-LA) of brass under helium and argon atmosphere were studied. For this purpose, particles were visualized by light scattering using a pulsed laser source. Aerosols were found to be captured in symmetric vortices when striking a solid boundary during their kinetic stage of expansion. Furthermore, high-repetitive LA resulted in the formation of a complex, macroscopic flow pattern driven by a pressure gradient locally built up. Our data indicate that aerosols released under those conditions experience only minor losses of around 1% if they get in contact with the inner walls of ablation cells operated at atmospheric pressures.
ISSN:0584-8547
1873-3565
DOI:10.1016/j.sab.2007.11.013