Figure 7
The third harmonic from the UE56 under slicing conditions at 1185 eV in elliptical mode (inset) and their peak intensity measured with sliced photons at 1185 eV (dots) for a shift parameter (see Sasaki et al., 1992) of 25 mm and a femtobump setting of −0.75 mrad taken at different power settings P (W) of the slicing laser (single sweeps, 0.5 s per data point). Asymmetry of these peaks is due to finite acceptance (∼0.1 mrad × 0.1 mrad, red-shifted photons accepted). At P = 5.7 W (<1 mJ), the short pulse component is completely hidden behind a picosecond background, hence a power level of >6 W (1 mJ) is mandatory; routine operation requires >9 W. |