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Pointing of laser-accelerated proton beams
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Photograph of an energy dispersed proton trace which is detected with a multichannel plate and phosphorous screen imaging device and a pinhole Thomson spectrometer, the imaging ratio is 1:1 (b) Detected proton trace with a magnified imaging ratio of 1:15, target and laser parameter (see the text).

Image of FIG. 2.
FIG. 2.

Scheme of the geometry in the measurement: The source coordinates of the target are imaged to the detector plane via a pinhole and are dispersed due to their energy in the spectrometer (not depicted for simplicity) along a trace (gray shaded area) which will be compared to the ideal parabolic trace (parabolic line). The ideal trace is calculated from a source without directional emission fluctuation.

Image of FIG. 3.
FIG. 3.

(Color) Result of the analysis of the recorded proton emission shown in Fig. 1(b). The source emission coordinates and are plotted as a function of proton energy.

Image of FIG. 4.
FIG. 4.

Divergence of the beamlet calculated from the trace width of the recorded proton beam shown in Fig. 1(b) in dependence of the energy.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pointing of laser-accelerated proton beams