Journal Article RIXS Be compound refractive lenses C and O K-edge spectra European XFEL FEL Heisenberg RIXS KB mirrors Research Support, Non-U.S. Gov't X-ray Raman scattering X-ray resonant diffraction XAS XES charge order evolutionary algorithms free-electron lasers hRIXS liquid jet lithium-ion battery electrolyte multi-objective optimization non-resonant inelastic X-ray scattering photochemistry resonant X-ray diffraction resonant inelastic X-ray scattering soft X-rays spin dynamics spin order swarm intelligence synchrotron beamlines time-resolved spectroscopy