Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3645631
Keywords
aluminium compounds; carbon; helium; high-speed optical techniques; laser ablation; neodymium; nitrogen; plasma production by laser; time of flight spectra; yttrium compounds
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Funding
- US DOE NNSA [DE-NA0000463]
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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(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(2) and CN monochromatic fast imaging and their emission space-time contours suggest that recombination is the major mechanism of C(2) formation within the laser ablation carbon plumes in the presence of ambient gas. (C) 2011 American Institute of Physics. [doi:10.1063/1.3645631]
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