Late-time particle emission from laser-produced graphite plasma

Journal Article · Thu Sep 01 04:00:00 UTC 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3631789· OSTI ID:22036710

Harilal, S S; Hassanein, A; Polek, M ^[1]

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1. School of Nuclear Engineering, Center for Materials Under Extreme Environment, Purdue University, West Lafayette, Indiana 47907 (United States)

We report a late-time ''fireworks-like'' particle emission from laser-produced graphite plasma during its evolution. Plasmas were produced using graphite targets excited with 1064 nm Nd: yttrium aluminum garnet (YAG) laser in vacuum. The time evolution of graphite plasma was investigated using fast gated imaging and visible emission spectroscopy. The emission dynamics of plasma is rapidly changing with time and the delayed firework-like emission from the graphite target followed a black-body curve. Our studies indicated that such firework-like emission is strongly depended on target material properties and explained due to material spallation caused by overheating the trapped gases through thermal diffusion along the layer structures of graphite.

• OSTI ID: 22036710
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 5 Vol. 110; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
EMISSION SPECTROSCOPY
GRAPHITE
LASER TARGETS
LASER-PRODUCED PLASMA
LAYERS
NEODYMIUM LASERS
PLASMA DIAGNOSTICS
PLASMA HEATING
PLASMA PRODUCTION
THERMAL DIFFUSION
TRAPPING
VISIBLE SPECTRA