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Two-dimensional particle-in-cell simulations of plasma cavitation and bursty Brillouin backscattering for nonrelativistic laser intensities
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10.1063/1.2244528
/content/aip/journal/pop/13/8/10.1063/1.2244528
http://aip.metastore.ingenta.com/content/aip/journal/pop/13/8/10.1063/1.2244528
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Time evolution of the instantaneous reflectivity averaged over the transverse direction (top) and a blowup of the first (bottom). The reflectivities are normalized to the maximum of the incident laser intensity.

Image of FIG. 2.
FIG. 2.

(Color online) Bird’s-eye view of the spatio-temporal evolution of the backscattered intensity. The average lifetime of a speckle is of the order of .

Image of FIG. 3.
FIG. 3.

Time evolution of the transmission averaged over the transverse direction. The figure shows the instantaneous value of the transmitted light normalized to the maximum of the incident laser amplitude.

Image of FIG. 4.
FIG. 4.

Schematic presentation of the time evolution of the global reflectivity toward a state of homogeneous turbulence.

Image of FIG. 5.
FIG. 5.

Time evolution of the reflectivity averaged over the transverse direction (top) and a blowup of the first (bottom) for an intensity and . The remaining parameters are identical to the other runs.

Image of FIG. 6.
FIG. 6.

(Color online) The electromagnetic fields (left column) and the logarithm of their 2D spectra (right column) inside the plasma at time : (top row), (middle row), and (bottom row). Note that the field amplitudes are given in relativistic units . The amplitude of the incident plane wave corresponds to .

Image of FIG. 7.
FIG. 7.

(Color online) Same as Fig. 6 but at time .

Image of FIG. 8.
FIG. 8.

(Color online) The state of the density at after cavitation has taken place in each filament. The laser is coming from the left. Here and in the following figures the density is given in units of the critical density.

Image of FIG. 9.
FIG. 9.

Time evolution of the instantaneous electron (continuous line) and ion (dashed line) kinetic energy per particle. The initial increase for the electrons is simply due to the particles oscillating in the incident laser field. As reflectivity takes off from it disappears (see Fig. 1).

Image of FIG. 10.
FIG. 10.

(Color online) The density at obtained for an intensity ; all remaining parameters are identical to the run shown in Fig. 8.

Image of FIG. 11.
FIG. 11.

(Color online) The plasma density (top) and the electromagnetic field (bottom) . Note that the plasma extends in parallel direction from to .

Image of FIG. 12.
FIG. 12.

Time evolution of the backscattered intensity in front of the cavity located at (top) and at a noncavity location at (bottom).

Image of FIG. 13.
FIG. 13.

(Color online) Blowup of the electron density at the cavity location at .

Image of FIG. 14.
FIG. 14.

(Color online) Intensity distribution in one of the cavities.

Image of FIG. 15.
FIG. 15.

Logarithm of the frequency spectra integrated over the time interval for two different cavities: (top), (middle), and (bottom). Note that the relative value of the and components may vary according to the exact location of the probe inside the cavity.

Image of FIG. 16.
FIG. 16.

Blowup of the frequency spectra (linear scale) integrated over the time interval : (top), (middle), and (bottom).

Image of FIG. 17.
FIG. 17.

(Color online) Logarithm of the number density of the parallel electron phase space at time . The velocities (top) and (bottom) are averaged over the transverse direction.

Image of FIG. 18.
FIG. 18.

(Color online) Same as Fig. 17 at .

Image of FIG. 19.
FIG. 19.

(Color online) Same as Fig. 18 but showing the whole simulation region.

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/content/aip/journal/pop/13/8/10.1063/1.2244528
2006-08-08
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Two-dimensional particle-in-cell simulations of plasma cavitation and bursty Brillouin backscattering for nonrelativistic laser intensities
http://aip.metastore.ingenta.com/content/aip/journal/pop/13/8/10.1063/1.2244528
10.1063/1.2244528
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