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Proceedings Paper

Current measurements in plasma produced by the train of 10.6-um subnanosecond laser pulses
Author(s): Victor V. Apollonov; K. Kh. Kazakov; N. V. Pletnyev; Vladimir R. Sorochenko
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Paper Abstract

Results of current probe measurements for a plasma produced by the train of approximately 200 ps 10.6 micrometers laser pulses are reported. The train of pulses was obtained as a result of regenerative amplification of approximately 100 ps laser pulse in a 5 cm aperture 6 atm TE-CO2 laser. Experiments were carried out for Wo and Al targets dispersed in vacuum, two values of the interpulses separation in the train (Delta) T equals 9.3 and 29 ns and wide range of energy density on the target, corresponding to peak intensities of single pulses Ip equals 1 divided by 300 GW/cm2. Experiments had shown large difference of temporal structure of current signal with Wo and Al targets due to the considerable different in melting temperatures of these materials as well as radiation loses of laser plasma. We detected large ratio of current signal amplitudes for targets irradiation by the pulse train or gain switched pulse generated in TE-CO2 laser without injection of a short pulse. Results of these measurements are compared with those earlier obtained for nanosecond pulse train.

Paper Details

Date Published: 11 January 2000
PDF: 9 pages
Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); doi: 10.1117/12.375110
Show Author Affiliations
Victor V. Apollonov, General Physics Institute (Russia)
K. Kh. Kazakov, General Physics Institute (Russia)
N. V. Pletnyev, General Physics Institute (Russia)
Vladimir R. Sorochenko, General Physics Institute (Russia)


Published in SPIE Proceedings Vol. 3886:
High-Power Lasers in Energy Engineering
Kunioki Mima; Gerald L. Kulcinski; William J. Hogan, Editor(s)

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