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Proceedings Paper

Bubble dynamics induced by YAG laser focusing in liquid nitrogen and cryogenic laser processing for particles
Author(s): Soju Watanabe; Takumi Sirato; Masanori Ota; Kazuo Maeno
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Paper Abstract

The cryogenic liquid with vapor bubbles is regarded as phase-changing and unsteady field with heat and mass transfer phenomena. The cryogenic liquid has a characteristic feature of the small latent heat, surface tension, and viscosity, as compared with those of normal temperature water. As the cryogenic laser processing technology is still under development and research, there have been few reports on laser-matter interactions, for example, on micro/nano particle production. This paper firstly deals with behavior of a cavitation bubble induced by a pulsed YAG laser in liquid nitrogen. The interaction of the bubble with the solid wall has been studied by flow visualization, and, furthermore, the laser-particle processing in liquid nitrogen has been studied. As our research on cryogenic laser-submicron particle processing is in the first stage of experiment, the paper concentrates mainly on the microscopic observation of the laser-processed holes on Al surface and small particles.

Paper Details

Date Published: 26 April 2007
PDF: 8 pages
Proc. SPIE 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 63461R (26 April 2007); doi: 10.1117/12.738841
Show Author Affiliations
Soju Watanabe, Chiba Univ. (Japan)
Takumi Sirato, Chiba Univ. (Japan)
Masanori Ota, Chiba Univ. (Japan)
Kazuo Maeno, Chiba Univ. (Japan)


Published in SPIE Proceedings Vol. 6346:
XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

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