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Envelope-kinetic analysis of the electron kinetic effects on Raman backscatter and Raman backward laser amplification
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10.1063/1.2646493
/content/aip/journal/pop/14/3/10.1063/1.2646493
http://aip.metastore.ingenta.com/content/aip/journal/pop/14/3/10.1063/1.2646493
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Numerical solutions of the three-wave model with (solid) and without (dotted) the second-order frequency shift . Here the linear thermal shift of Langmuir wave frequency, and is the second-order frequency shift.

Image of FIG. 2.
FIG. 2.

Laser amplification in the nontrapping regime. The pump amplitude is and the initial seed amplitude is . The wavelengths of the seed and pump are and , respectively. The plasma density is and the temperature of the plasma is . (a) In the early stage of the amplification, the seed is amplified and broadened. (b) The amplification is in the nonlinear regime (the -pulse regime). (c) The electron phase space near the peak of the seed in (b).

Image of FIG. 3.
FIG. 3.

Laser amplification in the trapping regime. The pump amplitude is . The laser wavelengths and the initial seed amplitude are the same as in Fig. 2. The plasma density and temperature are and , respectively. (a), (b) The amplifications at and , respectively. (c), (d) Corresponding electron phase spaces near the peaks of the seeds.

Image of FIG. 4.
FIG. 4.

Measurement of [Eq. (33)] and [Eq. (34)] from the aPIC simulation. The simulation parameters are the same as in Fig. 3.

Image of FIG. 5.
FIG. 5.

Simulations of the strong pump case (parameters are the same as in Fig. 3) using aPIC, test particle scheme, and the three-wave fluid model.

Image of FIG. 6.
FIG. 6.

Comparisons of the three different schemes. Parameters are the same as in Fig. 5, except the pump amplitude .

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/content/aip/journal/pop/14/3/10.1063/1.2646493
2007-03-08
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Envelope-kinetic analysis of the electron kinetic effects on Raman backscatter and Raman backward laser amplification
http://aip.metastore.ingenta.com/content/aip/journal/pop/14/3/10.1063/1.2646493
10.1063/1.2646493
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