Journal Article Archäologie Bragg ptychography European XFEL Kastell Materials Imaging and Dynamics instrument X-ray free-electron lasers X-ray microscopy XFELs anti-phase domain boundary beam diagnostics bent-diamond-crystal spectrometer coherent X-ray diffraction imaging diffract-then-destroy dynamical studies modulus homogenization multipurpose diagnostic end-station phase contrast X-ray imaging phase problem pump–probe sample delivery strong phase object time-resolved holographic imaging