Abstract
Signatures of Stimulated Raman backscattering of a short-pulse high-intensity laser interacting with an underdense plasma are discussed. We introduce a nonlinear three-wave interaction model that accounts for laser pump depletion and relativistic detuning. A mechanism is revealed based on a generic route to chaos, that predicts a progressive increase of the backscatter complexity with a growing laser intensity. Importance of kinetic effects is outlined and demonstrated in fluid-hybrid and particle simulations. As an application, we show that spectral anomalies of the backscatter, predicted by the above model, are consistent with recent sub-picosecond, high-intensity laser gas-target measurements at Livermore and elsewhere. Finally, a recently proposed scheme for generation of ultra-short, low-prepulse laser pulses by Raman backscattering in a thin foil target, is shown. (author)
Skoric, M M;
[1]
Tajima, Toshiki;
Sasaki, Akira;
Maluckov, A;
Jovanovic, M
- Vinca Inst. of Nuclear Sciences, Belgrade (Yugoslavia)
Citation Formats
Skoric, M M, Tajima, Toshiki, Sasaki, Akira, Maluckov, A, and Jovanovic, M.
Stimulated Raman backscattering at high laser intensities.
Japan: N. p.,
1998.
Web.
Skoric, M M, Tajima, Toshiki, Sasaki, Akira, Maluckov, A, & Jovanovic, M.
Stimulated Raman backscattering at high laser intensities.
Japan.
Skoric, M M, Tajima, Toshiki, Sasaki, Akira, Maluckov, A, and Jovanovic, M.
1998.
"Stimulated Raman backscattering at high laser intensities."
Japan.
@misc{etde_307665,
title = {Stimulated Raman backscattering at high laser intensities}
author = {Skoric, M M, Tajima, Toshiki, Sasaki, Akira, Maluckov, A, and Jovanovic, M}
abstractNote = {Signatures of Stimulated Raman backscattering of a short-pulse high-intensity laser interacting with an underdense plasma are discussed. We introduce a nonlinear three-wave interaction model that accounts for laser pump depletion and relativistic detuning. A mechanism is revealed based on a generic route to chaos, that predicts a progressive increase of the backscatter complexity with a growing laser intensity. Importance of kinetic effects is outlined and demonstrated in fluid-hybrid and particle simulations. As an application, we show that spectral anomalies of the backscatter, predicted by the above model, are consistent with recent sub-picosecond, high-intensity laser gas-target measurements at Livermore and elsewhere. Finally, a recently proposed scheme for generation of ultra-short, low-prepulse laser pulses by Raman backscattering in a thin foil target, is shown. (author)}
place = {Japan}
year = {1998}
month = {Mar}
}
title = {Stimulated Raman backscattering at high laser intensities}
author = {Skoric, M M, Tajima, Toshiki, Sasaki, Akira, Maluckov, A, and Jovanovic, M}
abstractNote = {Signatures of Stimulated Raman backscattering of a short-pulse high-intensity laser interacting with an underdense plasma are discussed. We introduce a nonlinear three-wave interaction model that accounts for laser pump depletion and relativistic detuning. A mechanism is revealed based on a generic route to chaos, that predicts a progressive increase of the backscatter complexity with a growing laser intensity. Importance of kinetic effects is outlined and demonstrated in fluid-hybrid and particle simulations. As an application, we show that spectral anomalies of the backscatter, predicted by the above model, are consistent with recent sub-picosecond, high-intensity laser gas-target measurements at Livermore and elsewhere. Finally, a recently proposed scheme for generation of ultra-short, low-prepulse laser pulses by Raman backscattering in a thin foil target, is shown. (author)}
place = {Japan}
year = {1998}
month = {Mar}
}