Measurement of plasma wave frequency from absolute stimulated Raman scattering near the quarter-critical surface in a laser plasma

1987 ◽  
Vol 30 (12) ◽  
pp. 3832 ◽  
Author(s):  
D. M. Villeneuve ◽  
J. E. Bernard ◽  
H. A. Baldis
Keyword(s):  
Raman Scattering ◽  
Plasma Wave ◽  
Laser Plasma ◽  
Stimulated Raman Scattering ◽  
Wave Frequency ◽  
Critical Surface ◽  
Stimulated Raman

Raman scattering

1986 ◽  
Vol 64 (8) ◽  
pp. 956-960 ◽  
Author(s):  
Albert Simon
Keyword(s):  
Raman Scattering ◽  
Alternative Explanation ◽  
Stimulated Raman Scattering ◽  
Scattered Light ◽  
Hot Electrons ◽  
Critical Surface ◽  
Laser Produced Plasma ◽  
Stimulated Raman

Observations of Raman scattered light from inhomogeneous laser-produced plasma have shown characteristics quite different from the simple predictions for the stimulated Raman scattering instability. An alternative explanation in terms of enhanced scattering, produced by bursts of hot electrons arising at the quarter-critical or critical surface, is described. Comparison is made between the predictions of this theory and four experiments.

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.

scholarly journals STIMULATED RAMAN SCATTERING IN LASER PLASMA TARGETS

1991 ◽  
Vol 40 (10) ◽  
pp. 1642
Author(s):  
ZHANG JIA-TAI ◽  
XU LIN-BAO ◽  
CHANG TIE-QIANG ◽  
ZHANG SHO-GUI ◽  
NIE XIAO-BO ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Laser Plasma ◽  
Stimulated Raman Scattering ◽  
Stimulated Raman

Measurement of time-resolved spectra of scattered light by stimulated Raman scattering from laser plasma

2010 ◽  
Vol 22 (9) ◽  
pp. 2051-2054
Author(s):  
王传珂 Wang Chuanke ◽  
焦春晔 Jiao Chunye ◽  
王峰 Wang Feng ◽  
蒋小华 Jiang Xiaohua ◽  
刘永刚 Liu Yonggang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Laser Plasma ◽  
Stimulated Raman Scattering ◽  
Scattered Light ◽  
Time Resolved ◽  
Stimulated Raman
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