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Effect of nonlinear Landau damping in plasma-based backward Raman amplifier
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10.1063/1.3160606
/content/aip/journal/pop/16/7/10.1063/1.3160606
http://aip.metastore.ingenta.com/content/aip/journal/pop/16/7/10.1063/1.3160606
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Amplified pulse in the model with quasilinear saturation of Landau damping (solid blue line) is compared to the amplified pulses in the models with linear Landau damping (dashed red line) and no Landau damping (dotted black line). is the scaled longitudinal coordinate along the amplified pulse. The parameters of the simulations are the same as in Fig. 3.

Image of FIG. 2.
FIG. 2.

Numerically (solid blue line) calculated dependence of the parameter and its analytical (dashed red line) approximation with expression (28). Parameter characterizes the amplification length required for significant saturation of Landau damping as defined by Eq. (26); is proportional to the ratio of the bounce frequency of the seeded plasma wave and the linear Landau damping rate as defined by Eq. (28).

Image of FIG. 3.
FIG. 3.

Longitudinal dependence of the amplified pulse amplitude. Solution of numerically solved set of Eqs. (4)–(7) (solid blue line) is compared with analytical approximation (35)–(40) (dashed red line). The parameters of simulation: , , , , and . Here is dimensionless growth rate of backward Raman instability ; is scaled longitudinal coordinate along the amplified pulse. For these parameters .

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/content/aip/journal/pop/16/7/10.1063/1.3160606
2009-07-08
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of nonlinear Landau damping in plasma-based backward Raman amplifier
http://aip.metastore.ingenta.com/content/aip/journal/pop/16/7/10.1063/1.3160606
10.1063/1.3160606
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