Physics – Plasma Physics
Scientific paper
2008-11-11
Physics
Plasma Physics
5 pages, 4 figures, 4 figure files, figure quality improved
Scientific paper
Raman amplification of a short laser pulse off a long laser beam has been demonstrated successfully for moderate probe intensities ($\sim 10^{16}$ W/cm$^2$) and widths ($\sim 50$ micron). However, truly competitive intensities can only be reached if the amplification process is carried out at much higher probe intensities ($10^{17}-10^{18}$ W/cm$^2$ after amplification) and widths (1-10 mm). In this paper we examine the opportunities and challenges provided by this regime through the first 2-dimensional particle-in-cell simulations using wide pulses. A parameter window is identified in which a 10 TW, 600 $\mu$m wide, 25 ps long laser pulse can be efficiently amplified to 2 PW peak intensity.
Bingham Richard
Cairns R. A.
Fiuza F.
Fonseca Raphael A.
Norreys Peter A.
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