Thresholds of plasma arising under the pulse CO2 laser radiation interaction with an obstacle in air and energetic balance of the process

N. A. Babaeva; Yu. M. Vas'kovsky; M. I. Zhavoronkov; R. E. Rovinsky; V. A. Rjabinkina

doi:10.1117/12.48158

1 December 1991 Thresholds of plasma arising under the pulse CO2 laser radiation interaction with an obstacle in air and energetic balance of the process

N. A. Babaeva, Yu. M. Vas'kovsky, M. I. Zhavoronkov, R. E. Rovinsky, V. A. Rjabinkina

Author Affiliations +

Proceedings Volume 1440, Optical Radiation Interaction with Matter; (1991) https://doi.org/10.1117/12.48158
Event: Optical Radiation Interaction with Matter, 1990, Leningrad, Russian Federation

Abstract

Experimental data are given concerning plasma air breakdown near the surface of samples made of different materials, depending on energy density and length (shape) of TEA CO2 laser pulse in the range of 1 divided by 40 J/cm2 and 2 divided by 8 microsecond(s) with the spot radiation size of 10 cm2. Energy thresholds of the plasma arising and their dependence on laser pulse length are determined. Experimental data are given concerning energetic balance components of laser pulse interaction in the conditions of plasma forming: energy outlay for plasma forming, losses due to plasma radiation, and thermal flow into sample. With these data in mind the energy part of the laser pulse absorbed by sample and that dissipated into surroundings are determined.

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N. A. Babaeva, Yu. M. Vas'kovsky, M. I. Zhavoronkov, R. E. Rovinsky, and V. A. Rjabinkina "Thresholds of plasma arising under the pulse CO2 laser radiation interaction with an obstacle in air and energetic balance of the process", Proc. SPIE 1440, Optical Radiation Interaction with Matter, (1 December 1991); https://doi.org/10.1117/12.48158

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