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Collisional and collective effects in two dimensional model for fast-electron transport in refluxing regime
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10.1063/1.4771586
/content/aip/journal/pop/20/1/10.1063/1.4771586
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/1/10.1063/1.4771586
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Left) Multilayer target design with X,Y the propagation layers with thickness and the tracer layer with thickness ; the simple target is obtained by imposing (right). Divergence model where represents the length at which the electron transverse spot is doubled, in analogy with Rayleigh range in optics and with beta function in beam dynamics.

Image of FIG. 2.
FIG. 2.

(Left) Normalized number of photons ( ) for (copper in copper) Vs (no photon re-absorption) as a function of the electron range in a thick target; (right) normalized mean radius ( ) for different target thickness for and for in a thick target.

Image of FIG. 3.
FIG. 3.

(Left) Normalized number of photons ( ) versus refluxing number with (blue dotted and dot-dashed lines) and without (red continuos and dashed lines) refluxing for and for for a given reflectivity ; (right) ratio between integrated signal with and without refluxing for different values of reflection index. For both the graphs, .

Image of FIG. 4.
FIG. 4.

(Left) Normalized photons number ( ) versus refluxing number with ( red) and without ( blue dotted) propagation layer for ; (right) normalized mean radius ( ) of the emitted photons distribution versus the refluxing numbers for different values of the ratio (blue dotted) the high divergence regime ; (red dashed) the intermediate divergence regime ; (gray dot-dashed) the low divergence regime . The parameters are: , and .

Image of FIG. 5.
FIG. 5.

Collisional stopping power (in units of keV/μm) with (black dashed line) and without (red dotted line) radiative contribution (blue line) for aluminium at room temperature as a function of Electron energy in units of keV.

Image of FIG. 6.
FIG. 6.

(Left) resistive stopping power (continue and dotted lines) and resistivity (1/ ) (dashed and dot-dashed lines) at a given position (z = 10 μm) and hot electron temperature (T = 200 keV) as a function of target temperature for plastic CH (blue continuous and dashed lines) and aluminium (red dotted and dot-dashed lines); (right) resistive stopping power at a given position (z = 10 μm) and target temperature as a function of the laser intensity (top) and hot electron temperature T (bottom) for a given energy E = 200 KeV and different values of the conversion efficiency compared with that calculated assuming Solodov 13 (continuous line) and Yu 14 (dashed line) scaling laws.

Image of FIG. 7.
FIG. 7.

Collisional (red), resistive (blue dotted line), and total (black dashed line) stopping power (left) and range as a function of the single electron energy for an electron distribution with a temperature . The target parameters are: and .

Image of FIG. 8.
FIG. 8.

Average resistive electron range calculated by using exponential electron distribution (red dotted and dot-dashed lines) and by using relativistic Maxwell-Juttner distribution (blue continuous and dashed lines). The target parameters are: and .

Image of FIG. 9.
FIG. 9.

Total electron range (left black dashed line), total electron stopping power (centre black dashed line) averaged over the relativistic Maxwell-Juttner distribution as a function of the hot electron temperature T or laser intensity I. (right) ratio between averaged resistive and collective stopping power as a function of T or laser intensity I. The target parameters are: and .

Image of FIG. 10.
FIG. 10.

Interpolation function (black dashed line) compared with Beg's (red dotted line) and Wilks (blue line) scalings as a function of T and .

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/content/aip/journal/pop/20/1/10.1063/1.4771586
2013-01-11
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Collisional and collective effects in two dimensional model for fast-electron transport in refluxing regime
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/1/10.1063/1.4771586
10.1063/1.4771586
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