Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-25T22:38:33.706Z Has data issue: false hasContentIssue false
  • English
  • Français

On absorption of the laser radiation in a plasma with subcritical density

Published online by Cambridge University Press:  09 March 2009

V. V. Alexandrov ,
N. G. Kovalsky ,
M. I. Pergament  and
A. M. Rubenchik
V. V. Alexandrov
Affiliation:
Kurchatov Institute of Atomic Energy, Moscow, USSR
N. G. Kovalsky
Affiliation:
Kurchatov Institute of Atomic Energy, Moscow, USSR
M. I. Pergament
Affiliation:
Kurchatov Institute of Atomic Energy, Moscow, USSR
A. M. Rubenchik
Affiliation:
Kurchatov Institute of Atomic Energy, Moscow, USSR
Get access Rights & Permissions [Opens in a new window]

Abstract

Absorption, reflection and scattering of laser radiation have been studied in experiments with oblique incidence of Nd glass laser beams on plane massive targets of polyethylene, aluminium and copper. Time behaviour of 2ω and 3/2;ω harmonic intensities and their angular distributions were measured along with plasma X-ray spectra in the flux density range 1013 to 3×1014 W/cm2 for 3.5 nsec laser pulses. Comparison of the experimental data with the results of the theoretical analysis and numerical calculations is presented and relatively strong absorption of about 10% is estimated in the quarter critical density region of the plasma corona due to the two-plasmon decay instability growth. The hard X-ray component in the X-ray spectrum disappears at large angles of incidence, hence the supra-thermal electron generation and two-plasmon instability are proven to be coupled phenomena.

Type
Research Article
Information
Laser and Particle Beams , Volume 2 , Issue 2 , May 1984 , pp. 213 - 221
Copyright
Copyright © Cambridge University Press 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alexandrov, V. V. et al. 1976 ZhETF, 71, 1826.Google Scholar
Alexandrov, V. V. et al. 1981 Plasma Diagnostics Vol. 4, p. 61, Energoizdat, Moscow, 61–65.Google Scholar
Alexandrov, V. V. et al. 1982 Pis'ma υ ZhETF, 37, 68.Google Scholar
Anisimov, S. I. et al. 1981 Dokl. Akad. Nauk USSR, 258, 78.Google Scholar
Chen, H. H. & Liu, C. S. 1977 Phys. Rev. Lett. 39, 881.CrossRefGoogle Scholar
Kanatov, A. A., Rubenchik, A. M. & Rybak, I. Ya. 1982 Fizika plazmy, 8, 581.Google Scholar
Kruer, W. L. & Dawson, J. M. 1972 Phys. Fluids, 15, 446.Google Scholar
Kruer, W. L. et al. 1977 Collective behavior in recent laser plasma experiments, preprint UCRL-77730.Google Scholar
Langdon, A. B. & Losinsky, B. 1976 Methods of computational physics, Academic Press, New York.Google Scholar
Langdon, A. B. & Losinsky, B. 1977 Phys. Rev. Lett. 34, 934.Google Scholar
Manheimer, W. M. & Colombant, D. C. 1978. Phys. Fluids, 21, 1818.Google Scholar
Rubenchik, A. M. 1975 ZhETF, 68, 1004.Google Scholar
Rubenchik, A. M. 1977 Proc. of the 13th Int. Conf. on Plasma and Ionized Gases,Berlin,1977.Google Scholar
Sagdeev, R. Z. et al. 1982 ZhETF, 82, 125.Google Scholar
Silin, V. P. 1973 Parametric effect of high-power radiation on the plasma, Nauka, Moscow.Google Scholar