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Abstract: Raman amplification of a short laser pulse off a long laser beam has beendemonstrated successfully for moderate probe intensities $\sim 10^{16}$W-cm$^2$ and widths $\sim 50$ micron. However, truly competitive intensitiescan only be reached if the amplification process is carried out at much higherprobe intensities $10^{17}-10^{18}$ W-cm$^2$ after amplification and widths1-10 mm. In this paper we examine the opportunities and challenges providedby this regime through the first 2-dimensional particle-in-cell simulationsusing 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 peakintensity.



Author: R.M.G.M. Trines, F. Fiúza, R. Bingham, R.A. Fonseca, L.O. Silva, R.A. Cairns, P.A. Norreys

Source: https://arxiv.org/







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