Figure 5.

Temperature profiles of the heated Pb sample. (a) Image of the laser-heated hot spot overlaid with the actual X-ray beam size (6 µm × 4 µm FWHM). (b, c) Temperature scans with step size of 2 µm performed vertically and horizontally across the hot spot. The error bars have been calculated from the two-colour pyrometry according to the method described by Benedetti & Loubeyre (2004 ▸). (d) Example of the quality of the two-colour pyrometry obtained at the centre of the hot spot from the upstream side of the sample.