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Micro focusing of fast electrons with opened cone targets
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10.1063/1.3671954
/content/aip/journal/pop/19/1/10.1063/1.3671954
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/1/10.1063/1.3671954
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Image of the re-entrant cone arrays etched in a silicon wafer. (b) Image of an etched cone taken by a scanning electron microscope (top view). (c) Schematic view of the cone configuration. The width of the open entrance is 5 μm.

Image of FIG. 2.
FIG. 2.

(Color online) Schematic picture of the experimental setup. The IP stack behind the target detects the spatial distributions of the fast electrons.

Image of FIG. 3.
FIG. 3.

(Color online) Typical fast electron spatial distributions detected by imaging plates behind the opened cone target. The focusing and target geometry are illustrated on the left. Each column of the images has the same detected energy interval and is scaled to the same intensity level. The first layer of the imaging plates detects the fast electrons with energies >45 keV, the second layer > 550 keV, and the third layer >900 keV, respectively.

Image of FIG. 4.
FIG. 4.

(Color online) The integrated intensity of the signal on the three IP layers for three cases. Cases (i), (ii), and (iii) correspond to the three cases described in the text.

Image of FIG. 5.
FIG. 5.

(Color online) The 2D PIC simulation configuration of the interactions.

Image of FIG. 6.
FIG. 6.

(Color online) (a) The simulated angular distributions of the fast electrons out of the entrance of the cone targets for case (i), (b) case (ii), and (c) case (iii) at time t=906 fs. The red dashed dotted line indicates the laser propagation direction (0°).

Image of FIG. 7.
FIG. 7.

(Color online) The simulated angular distribution of the fast electrons in case (iii) with a pre-plasma scale length (a) 0.1λ 0 (b) 6λ 0 .

Image of FIG. 8.
FIG. 8.

(Color online) The integrated intensity of fast electrons in different energy intervals for the opened cone targets.

Image of FIG. 9.
FIG. 9.

(Color online) (a) The time-averaged magnetic field distributions for case (i), (b) case (ii), and (c) case (iii) at time t=240 fs.

Image of FIG. 10.
FIG. 10.

(Color online) (a) The time-averaged current density for case (ii) and (b) case (iii) at time t=240 fs.

Image of FIG. 11.
FIG. 11.

(Color online) The density map of the closed cone targets with a plane slab thickness 6λ 0 behind the opened cone. There is no gap between the slab and the cone. The laser is incident from the left.

Image of FIG. 12.
FIG. 12.

(Color online) The simulated angular distributions of the fast electrons emitted from the closed cone targets when the laser is incident into the cone as a line focus. The red dashed dotted line indicates the laser propagation direction (0°).

Image of FIG. 13.
FIG. 13.

(Color online) (a) The distributions of the static magnetic field Bz for the sealed cone target at time t=160 fs and (b) at t=187 fs. (c) The distributions of the static electric field Ex at time t=160 fs and (d) at t=187 fs. (e) The distributions of the current density jx at time t=160 fs and (f) at t=187 fs.

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/content/aip/journal/pop/19/1/10.1063/1.3671954
2012-01-06
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Micro focusing of fast electrons with opened cone targets
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/1/10.1063/1.3671954
10.1063/1.3671954
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