Shock Wave and Emission with Sheet-like Structure Induced by Nd-YAG Laser Ablation at Reduced Pressure

A Nd-YAG laser (8 ns, 79 mJ) was focused in air at 5 Torr on a Zn target in front of which a thin wire (0.32 mm f) was placed as an obstacle near the laser focusing point (2 mm from the target and 0.75 mm from the axis of laser beam). A sheet-like plasma is produced with two branches, showing a V-sh...

Full description

Saved in:
Bibliographic Details
Published in:Japanese Journal of Applied Physics 2002, Vol.41 (Part 1, No. 6A), p.3747-3751
Main Authors: Madjid, Syahrun Nur, Kurniawan, Hendrik, Kitazima, Iwao, Kagawa, Kiichiro
Format: Article
Language:English
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A Nd-YAG laser (8 ns, 79 mJ) was focused in air at 5 Torr on a Zn target in front of which a thin wire (0.32 mm f) was placed as an obstacle near the laser focusing point (2 mm from the target and 0.75 mm from the axis of laser beam). A sheet-like plasma is produced with two branches, showing a V-shape emission structure when observed from the side. When two wires were symmetrically placed against the laser beam, a sheet-like plasma with three branches appeared with the strongest emission in the middle. Simultaneous detection was made on the middle sheet-like plasma to prove the coincidence of the Zn I 481.0 nm emission front due to propelling atoms and the density jump due to the shock wave. Total emission intensity is almost independent of the structure of the secondary plasma. 34 refs.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.41.3747