Journal Article XFELs Bragg ptychography European XFEL Maia detector Materials Imaging and Dynamics instrument QXANES Research Support, U.S. Gov't, Non-P.H.S. SASE XFEL spectrometers X-ray coherence X-ray free-electron laser X-ray free-electron lasers X-ray intensity measurement X-ray microscopy X-ray optics X-ray photon correlation spectroscopy (XPCS) X-ray speckle visibility spectroscopy (XSVS) XFEL anti-phase domain boundary beam diagnostics bent diamond crystals bent-diamond-crystal spectrometer coherent X-ray diffraction imaging diamond detector diffract-then-destroy dynamical diffraction dynamical studies dynamics free-electron lasers in-line spectrometers