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Electron energy boosting in laser-wake-field acceleration with external magnetic field and laser prepulses
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View: Figures


Image of FIG. 1.
FIG. 1.

Experimental setup.

Image of FIG. 2.
FIG. 2.

Typical energy spectra of accelerated electrons for initial gas density , and the laser power of 7 TW. (a) The 1.2 mm jet and : (a-1) The lowest PPP set, (a-2) the moderate PPP set; (b) the 4.0 mm jet with the moderate PPP set and ; (c) 4 mm jet with the largest PPP set and . The signals (c-1), (c-2), and (c-3) correspond to each portion on the screen image. The spectra are obtained by averaging of the signals over the beam divergence.

Image of FIG. 3.
FIG. 3.

Typical shadow graph images of the plasma at 1.2 ps prior to the main pulse measured simultaneously with the spectra shown in Figs. 2(a)–2(c). Panel (a) corresponds to the spectrum (a-1) in Fig. 2(a), (b) to spectrum (a-2) in Fig. 2(a), (c) to spectra in Fig. 2(b), and (d) to spectra in Fig. 2(c). Gas-jet boundaries are marked by dashed lines. Figures at the upper right corner indicated by arrows represent the corresponding beam profiles.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electron energy boosting in laser-wake-field acceleration with external magnetic field B∼1 T and laser prepulses