Figure 7: Characteristics of the electromagnetic seed and amplifier plasma.
From: Laser light triggers increased Raman amplification in the regime of nonlinear Landau damping
(a) The spectral intensity of the foil SRS signal is shown at t=2.6 ns. With integration over a 500-μm spot size and a 5-ps duration, it peaks at 0.59 mJ nm−1, which represents better performances than reached in Raman gas cells54, (b) The kλDe=0.23 and kλDe=0.3 curves are plotted in the (ne, Te) plane. The parameters values for which νc equals νL in a Maxwellian plasma are also shown for Te=2 keV for 351 nm laser wavelength, for Te=0.8 keV at 526 nm and for Te=50 eV at 800 nm. The experiments shown in this graph are those of ref. 35 close to 50 eV, of ref. 54 close to 200 eV and the one described in this paper close to 0.8 keV.
