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Kinetic and collisional effects on the linear evolution of fast ignition relevant beam instabilities
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10.1063/1.2953816
/content/aip/journal/pop/15/8/10.1063/1.2953816
http://aip.metastore.ingenta.com/content/aip/journal/pop/15/8/10.1063/1.2953816
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Critical beam instabilities for fast ignition.

Image of FIG. 2.
FIG. 2.

Density contours, , and the reduced distribution, , integrated over for the relativistic waterbag [(a), (b)], the Jüttner [(c), (d)], and the saddle point (low temperature) approximation to the Jüttner [(e), (f)] for and .

Image of FIG. 3.
FIG. 3.

Energy conservation for a 1D LSP simulation used for benchmarking analytical results in the collisional and collisionless regimes.

Image of FIG. 4.
FIG. 4.

Two-stream instability growth rate for the saddle point (solid), waterbag (dashed), and Jüttner (dotted-dashed) for a range of collision frequencies in the low temperature regime .

Image of FIG. 5.
FIG. 5.

Two-stream instability growth rate for the saddle point (solid), waterbag (dashed), and Jüttner (dotted-dashed) for a range of collision frequencies in the high temperature regime .

Image of FIG. 6.
FIG. 6.

Filamentary instability growth rate (a) and corresponding real frequency (b) for the saddle point (solid) and the waterbag (dashed), and for a range of collision frequencies in the low temperature regime.

Image of FIG. 7.
FIG. 7.

Zero contours of the filamentary instability in for the relativistic waterbag distribution before the kink (a), at the kink (b), and after the “kink” (c). Red corresponds to the dispersion relation’s imaginary part and green corresponds to the real part.

Image of FIG. 8.
FIG. 8.

Filamentary instability growth rate for the saddle point (solid), waterbag (dashed), and the Jüttner (dotted-dashed) for a range of collision frequencies in the low temperature regime (a) and high temperature regime (b).

Image of FIG. 9.
FIG. 9.

Filamentary instability growth rate for the relativistic waterbag distribution for various values of the beam-to-plasma density ratio, , in the low temperature regime [(a), (b) (zoomed)] and the high temperature regime [(c), (d) (zoomed)].

Image of FIG. 10.
FIG. 10.

2D explicit simulation of a laser-plasma interaction at showing the density of all particles with . The filament used for extraction of the momentum distribution is outlined with white dashes.

Image of FIG. 11.
FIG. 11.

Histograms of the longitudinal (a) and transverse (b) momentum distributions extracted from a 2D explicit PIC simulation, along with best fits to the Jüttner, waterbag, and saddle point approximation.

Image of FIG. 12.
FIG. 12.

Growth rates of the filamentary (a) and two-stream instabilities (b) for the best fit Jüttner parameters ( and ) to the 2D Z3 explicit PIC simulation data.

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/content/aip/journal/pop/15/8/10.1063/1.2953816
2008-08-14
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Kinetic and collisional effects on the linear evolution of fast ignition relevant beam instabilities
http://aip.metastore.ingenta.com/content/aip/journal/pop/15/8/10.1063/1.2953816
10.1063/1.2953816
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