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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN 印刷: 1065-3090
ISSN オンライン: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v6.i4.50
pages 303-311

VISUALIZATION OF THE EXCIMER LASER ABLATION OF POLYETHYLENE

Kazuyoshi Fushinobu
Department of Mechanical Engineering, Tokyo Institute of Technology, Tokyo 152-8550, Japan
Yasushi Yokoyama
Department of Mechanical and Intelligent Systems Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan
Isao Satoh
Department of Mechanical and Control Engineering, Tokyo Institute of Technology, 152-8552 Tokyo, Japan

要約

Excimer laser ablation of a polyethylene sample is visualized by using a high-speed camera with 40500 frames per second. Both ArF and KrF lasers are used, and the laser fluence dependence is studied. The images show that the ablation dynamics strongly depend on laser fluence. The plume can be seen at low fluencies above the ablation threshold, flame appears at higher fluence, and the flames appear on the sample surface at the highest fluence level. Differences in laser wavelengths influence the fluence range of the ablation dynamics because of the absorption coefficient. The results help theoretical modeling of the excimer laser ablation.


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