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Energy enhancement of quasi-monoenergetic proton bunches using a slice-cone target
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10.1063/1.3660679
/content/aip/journal/pop/18/11/10.1063/1.3660679
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/11/10.1063/1.3660679
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Schematic of the slice-cone targets with a coated thin layer of protons at the rear surface for two cases. In plot (a), the dashed dotted lines mark the positions of the two oblique and symmetrical slices, corresponding to Case C in the text. In plot (b), the dashed line marks the position of a horizontal slice on the axis of the cone, corresponding to Case B in the text. A hollow cone target without any slice inside the cone is the Case A. The lengths are in units of laser wavelength λ 0.

Image of FIG. 2.
FIG. 2.

The proton energy spectra for Case A (dotted lines), Case B (dashed lines), and Case C (solid lines), respectively, at time t = 70τ 0 (a) and t = 120τ 0 (b) for a p-polarization laser pulse with a 0 = 5 and pulse duration 30τ 0.

Image of FIG. 3.
FIG. 3.

(Color online) The spatial distributions (the first row) and the angular distributions (the second row) of the protons in Case A where there is no slice (the first column, a), Case B where there is one slice (the second column, b), and Case C where there are two slices (the third column, c), respectively, at the time t = 70τ 0. The laser parameters are the same as in Figure 2.

Image of FIG. 4.
FIG. 4.

(Color online) (a) The energy spectra of the electrons escaping from the rear surface of the cone tip for Case A (black dotted line), Case B (green solid line), and Case C (red dashed line), respectively, at time t = 50τ 0. The electron temperatures are labeled on the curves. (b) On-axis distribution of sheath fields for Case A (black dotted line), Case B (green solid line), and Case C (red dashed line), respectively, at the time t = 60τ 0. The vertical black line denotes the rear surface of the cone tip. The laser parameters are the same as in Figure 2.

Image of FIG. 5.
FIG. 5.

(Color online) The spatial distributions (the first row) and their statistical results (the second row) for electrons escaping from the rear surface of the cone tip for Case A (the first column), Case B (the second column), and Case C (the third column), respectively, at time t = 50τ 0. In the first row, the color bar indicates the relative factor γ of the electrons. In the second row, the color bar shows the logarithm of the electron number.

Image of FIG. 6.
FIG. 6.

The proton energy spectra for the laser normal amplitude a 0 = 5 (dotted lines), a 0 = 10 (dotted dashed line), a 0 = 15 (dashed line) and a 0 = 20 (solid line), respectively, for the proposed two-oblique-slice-cone target.

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/content/aip/journal/pop/18/11/10.1063/1.3660679
2011-11-16
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Energy enhancement of quasi-monoenergetic proton bunches using a slice-cone target
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/11/10.1063/1.3660679
10.1063/1.3660679
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