Relativistic Landau damping of electron plasma waves in stimulated Raman scattering

2009 ◽  
Vol 16 (2) ◽  
pp. 022104 ◽  
Author(s):  
A. Bers ◽  
I. P. Shkarofsky ◽  
M. Shoucri
Keyword(s):  
Raman Scattering ◽  
Stimulated Raman Scattering ◽  
Plasma Waves ◽  
Electron Plasma ◽  
Landau Damping ◽  
Stimulated Raman

Detailed Characterization of Electron Plasma Waves Produced by Stimulated Raman Scattering

1996 ◽  
Vol 77 (18) ◽  
pp. 3807-3810 ◽  
Author(s):  
N. Renard ◽  
C. Labaune ◽  
H. A. Baldis ◽  
B. S. Bauer ◽  
B. Quesnel ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Stimulated Raman Scattering ◽  
Plasma Waves ◽  
Electron Plasma ◽  
Detailed Characterization ◽  
Stimulated Raman

Observation of plasma waves from absolute stimulated Raman scattering

1985 ◽  
Vol 28 (6) ◽  
pp. 1591 ◽  
Author(s):  
D. M. Villeneuve ◽  
C. J. Walsh ◽  
H. A. Baldis
Keyword(s):  
Raman Scattering ◽  
Stimulated Raman Scattering ◽  
Plasma Waves ◽  
Stimulated Raman

scholarly journals Investigation of stimulated Raman scattering using a short-pulse diffraction limited laser beam near the instability threshold

2009 ◽  
Vol 27 (1) ◽  
pp. 185-190 ◽  
Author(s):  
J.L. Kline ◽  
D.S. Montgomery ◽  
C. Rousseaux ◽  
S.D. Baton ◽  
V. Tassin ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Laser Plasma ◽  
Stimulated Raman Scattering ◽  
Short Pulse ◽  
Electron Plasma ◽  
Thomson Scattering ◽  
Wave Number ◽  
Particle In Cell ◽  
Laser Facility ◽  
Stimulated Raman

AbstractShort pulse laser plasma interaction experiments using diffraction limited beams provide an excellent platform to investigate the fundamental physics of stimulated Raman scattering. Detailed understanding of these laser plasma instabilities impacts the current inertial confinement fusion ignition designs and could potentially impact fast ignition when higher energy lasers are used with longer pulse durations (>1 kJ and >1 ps). Using short laser pulses, experiments can be modeled over the entire interaction time of the laser using particle-in-cell codes to validate our understanding quantitatively. Experiments have been conducted at the Trident laser facility and the Laboratoire pour l'Utilisation des Lasers Intenses (LULI) to investigate stimulated Raman scattering near the threshold of the instability using 527 nm and 1059 nm laser light, respectively, with 1.5–3.0 ps pulses. In both experiments, the interaction beam was focused into pre-ionized helium gas-jet plasma. Measurements of the reflectivity as a function of intensity and kλD were completed at the Trident laser facility, where k is the electron plasma wave number and λD is the plasma Debye length. At LULI, a 300 fs Thomson scattering probe is used to directly measure the density fluctuations of the driven electron plasma and ion acoustic waves. Work is currently underway comparing the results of the experiments with simulations using the VPIC particle-in-cell code. Details of the experimental results are presented in this manuscript.

Effects of Landau Damping and Collision on Stimulated Raman Scattering with Various Phase-Space Distributions

2021 ◽  
Author(s):  
Shanxiu XIE ◽  
Yong CHEN ◽  
Junchen YE ◽  
Yugu CHEN ◽  
Na PENG ◽  
...  
Keyword(s):  
Growth Rate ◽  
Raman Scattering ◽  
Stimulated Raman Scattering ◽  
Deep Understanding ◽  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Landau Damping ◽  
Hot Electron ◽  
Collisional Damping ◽  
Stimulated Raman

Abstract Stimulated Raman scattering (SRS) is one of the main instabilities affecting the success of the fusion ignition. Here, we study the relationship between Raman growth and Landau damping with various distribution functions combining the analytic formulas and Vlasov simulations. The Landau damping obtained by Vlasov-Poisson simulation and Raman growth rate obtained by Vlasov-Maxwell simulation are anti-correlated, which is consistent with our theoretical analysis quantitatively. Maxwellian distribution, flattened distribution, and bi-Maxwellian distribution are studied in detail, which represent three typical stages of SRS. We have also demonstrated the effects of plateau width, hot-electron fraction, hot-to-cold electron temperature ratio, and collisional damping on the Landau damping and growth rate. It gives us a deep understanding of SRS and possible ways to mitigate SRS through manipulating distribution functions to a high Landau damping regime.

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