Fig. 7: An overview of the spatial distribution of X-ray transmission imaging profiles.

Its correlation with Kα, Heα, and resonant emission yields (denoted as “Res''), the X-ray pulse energy measured by the IPM (denoted as “IPM''), as well as total XFEL transmission for all the shots, is shown alongside the imaging data. The good shots discussed in the main text are marked with black titles (satisfying the conditions of Heα emission yield exceeding 0.7 × 1010 photons per steradian and XFEL transmission below 0.9), while the others are indicated by gray titles. The spatial scale bar corresponds to 10 μm for all images.