ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The morphological changes and corresponding plume deflection effect during long laser(XeCl excimer laser, λ=308 nm, τ=30 ns) irradiation of Al target have been investigated,and resultsshowed that, a the number of laser pulses per site increases, the target morphology changes andproduces a visible deviation of the plasma plume up to 5º. Scanning electron spectroscopy analys ofthe target surface related the plume deflection angle to the target morphology and the number of laserpulses per site. Typically well-defined columnar structures oriented along the laser beam directionwere observed on the target surface. The plume created during the laser ablation was clearly visible tothe naked eye and was recorded by a digital camera. Detailed studies were also performed on theablation rate at different laser fluences (4.6 J/cm2-12.5 J/cm2). The morphologies and the thickness ofthe Al thin films deposited on Si substrates during the present laser ablation experiments were alsostudied. Finally, the scenario explaining the formation of columnar structure on target surfaceresponsible for the plume deflection effect will be discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.789.pdf
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