Time Resolved Analysis of C<sub>2</sub>Emission from Laser Induced Graphite Plasma in Helium Atmosphere

Harilal S. S., Issac Riju C., Bindhu C. V., Nampoori V. P. N., Vallabhan C. P. G.

doi:10.1143/jjap.36.134

Time Resolved Analysis of C<sub>2</sub>Emission from Laser Induced Graphite Plasma in Helium Atmosphere

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Harilal S. S.

Laser Division, International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India
Issac Riju C.

Laser Division, International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India
Bindhu C. V.

Laser Division, International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India
Nampoori V. P. N.

Laser Division, International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India
Vallabhan C. P. G.

Laser Division, International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India

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タイトル別名

Time Resolved Analysis of C2 Emission from Laser Induced Graphite Plasma in Helium Atmosphere.
Time Resolved Analysis of C2 Emission f

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説明

We report time resolved study of C₂ emission from laser produced carbon plasma in presence of ambient helium gas. The 1.06 µ m radiation from a Nd:YAG laser was focused onto a graphite target where it produced a transient plasma. We observed double peak structure in the time profile of C₂ species. The twin peaks were observed only after a threshold laser fluence. It is proposed that the faster velocity component in the temporal profiles originates mainly due to recombination processes. The laser fluence and ambient gas dependence of the double peak intensity distribution is also reported.