Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
59 (1991), S. 1302-1304
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The evolution dynamics of the fragments produced during KrF excimer laser (248 nm, 25 ns) ablation of YBa2Cu3O7−δ has been observed by ultrafast photography using a synchronized dye laser beam (∼1 ns) to probe above the target surface. The images show that fragment removal is initiated near the beginning of the laser pulse ((approximately-greater-than)10 ns), continues for a maximum of a few hundred nanoseconds, and has an expansion front velocity suggesting a target temperature varying from about 1500 to 4000 K or greater. The shock wave formed due to interaction of the ablated fragments with background oxygen gas has also been photographed, and its temporal evolution as a function of oxygen pressure has been shown to agree better with a planar than spherical model. The overall picture is that of an ablation process showing pronounced but understandable gas-dynamic effects.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.105481
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