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A Novel method for determination of the volume of material ejected as molten droplets during visible nanosecond ablation

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/109214

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Title: A Novel method for determination of the volume of material ejected as molten droplets during visible nanosecond ablation
Related: Applied optics, Vol. 43, Issue 35 (2004), p.6473-6476
DOI: 10.1364/AO.43.006473
Publisher: Optical Society of America
Date: 2004
FoR/RFCD Code(s): 020500 Optical Physics
Author/Creator: Fishburn, Jennifer M
Author/Creator: Withford, Michael J
Author/Creator: Coutts, David W
Author/Creator: Piper, James A
Description: A novel method is presented for determining the volume of molten material ejected from a substrate as a result of visible pulsed-laser ablation. A 100-μm-wide pulsed-laser light sheet (τ ~ 5 ns, λ = 532 nm) was used in conjunction with a CCD camera to provide high-speed cross-sectional images of single-pulse ablation of aluminum with a visible nanosecond laser source. Computational analysis of the two-dimensional gray-scale images was used to determine the total volume of material ejected from the substrate in the form of molten droplets. Ablation with dual-wavelength (511- and 578-nm) pulses of 30-ns duration was characterized under various fluence conditions (0–25 J cm⁻²), allowing a quantitative threshold for explosive melt ejection in aluminum to be established at ~10 J cm⁻². The temporal evolution of the ejected material showed that, for an incident fluence of ~40 J cm⁻², molten-droplet ejection commenced at ~400 ns and ceased after ~2 μs.
Description: 4 page(s)
Subject Keyword: 020500 Optical Physics
Resource Type: journal article
Organisation: Macquarie University. Dept. of Physics and Astronomy

Identifier: http://hdl.handle.net/1959.14/109214
Identifier: ISSN:0003-6935
Identifier: mq-rm-2008001978
Language: eng
Rights: This paper was published in [Applied optics] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-35-6473]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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