Gas dynamic effects on formation of carbon dimers in laser-produced plasmas

Journal Article · Mon Sep 26 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3645631· OSTI ID:22027752

Al-Shboul, K F; Harilal, S S; Hassanein, A

We investigated the effect of helium and nitrogen pressures on the dynamics of molecular species formation during laser ablation of carbon. For producing plasmas, planar carbon targets were irradiated with 1064 nm, 6 ns pulses from an Nd:yttrium aluminum garnet laser. The emission from excited C{sub 2} and CN molecules was studied using space resolved optical time-of-flight emission spectroscopy and spectrally resolved fast imaging. The intensity oscillations in C{sub 2} and CN monochromatic fast imaging and their emission space-time contours suggest that recombination is the major mechanism of C{sub 2} formation within the laser ablation carbon plumes in the presence of ambient gas.

• OSTI ID: 22027752
• Journal Information: Applied Physics Letters, Vol. 99, Issue 13; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
ALUMINIUM COMPOUNDS
CARBON
CARBON NITRIDES
DIMERS
EMISSION SPECTROSCOPY
EXCITED STATES
HELIUM
LASER TARGETS
LASER-PRODUCED PLASMA
MOLECULES
MONOCHROMATIC RADIATION
NITROGEN
OSCILLATIONS
PLASMA PRODUCTION
RECOMBINATION
TIME-OF-FLIGHT METHOD