NDLI: Pulse laser ablation of ground glass

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Pulse laser ablation of ground glass

Content Provider	Springer Nature Link
Author	Nishiyama, T. Kajiwara, T. Nakahara, M. Nagayama, K. Kubota, S. Kotsuka, Y.
Copyright Year	2007
Abstract	We have studied pulse laser ablation of ground glass surface. Ablation process in air and in vacuum has been observed by high speed framing camera. Burst of small fragments of glass has been observed in the present experiment, when ground glass surface is laser ablated through glass plate from rear side. Production of macro particles by laser ablation is an inherent characteristic of ground glass, and no similar phenomena have been observed in case of ablation of other transparent materials. By using ns-duration Nd:YAG laser of 100–400 mJ/pulse, observed maximum particle velocity ranges from 0.5 to 1.5 km/s. In order to understand the particle generation process, scanning electron micrograph observation of the ground surface in the region of no laser irradiation and also in the damaged region, has been made. Cleavage surface structure has been evidenced in the damaged surface area, which stems from plenty of micro cracks covering the virgin glass surface. Effects of surface roughness on the particle generation were studied by using ground glass of quartz with different surface roughness. Produced glass particles were captured in vacuum by a polymethylmetacrylate (PMMA) plate. Size distribution was obtained by analysing the trapped particles on the PMMA plate and revealed that most probable particles size has almost no dependence on the initial surface roughness. Finally, we applied the phenomena to ignite pentaerithritoltetranitrate (PETN) powder explosive, and succeeded in igniting (PETN) powder only by laser ablation of ground glass.
Ending Page	183
Page Count	13
Starting Page	171
File Format	PDF
ISSN	09381287
e-ISSN	14322153
Journal	Shock Waves
Issue Number	3
Volume Number	17
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-08-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ablation threshold Ground glass Roughened surface Solid State Physics and Spectroscopy Condensed Matter Acoustics Shock wave Thermodynamics Mechanics, Fluids, Thermodynamics Fluids Pulse laser ablation Laser ignition Debris cloud Energetic material
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanical Engineering

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