FINE-STRUCTURE IN THE TIME-OF-FLIGHT DISTRIBUTION OF C-2 IN LASER-PRODUCED PLASMA FROM GRAPHITE

Citation
Ss. Harilal et al., FINE-STRUCTURE IN THE TIME-OF-FLIGHT DISTRIBUTION OF C-2 IN LASER-PRODUCED PLASMA FROM GRAPHITE, Pramana, 49(3), 1997, pp. 317-322
Citations number
24
Categorie Soggetti
Physics
Journal title
ISSN journal
03044289
Volume
49
Issue
3
Year of publication
1997
Pages
317 - 322
Database
ISI
SICI code
0304-4289(1997)49:3<317:FITTDO>2.0.ZU;2-2
Abstract
Time resolved optical emission spectroscopy is employed to study the e xpansion dynamics of C-2 species in a graphite plasma produced during the Nd:YAG ablation. At low laser fluences a single peak distribution with low kinetic energy is observed. At higher fluences a twin peak di stribution is found. It has been noted that these double peak time of flight distribution splits into a triple peak structure at distances g reater than or equal to 17 mm from the target surface. The reason for the occurrence of multiple peak is due to different formation mechanis ms of C-2 species.