The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility


11-ID-D provides Time-Resolved X-ray absorption spectroscopy (TR-XAS) and X-ray scattering (TR-XS) to investigate multiple time- and length-scale structural dynamics underlying energy conversion processes in chemistry and materials sciences. TR-XAS and TR-XS use pulsed laser energy as an excitation source, then interrogates the system with stroboscopic X-ray pulse snapshots spanning the time domain from 80 ps to 1 ms. The scientific program at 11-ID-D focuses on the correlation between electronic and structural dynamics linked to molecular and interfacial electron transfer processes that are fundamental to energy conversion in a broad range of scientific disciplines, including solar energy conversion, catalysis, geochemistry, fuel cells, and electrochemical (battery) energy storage.  

Excitation Source - Two laser systems
Probe Source - Two Undulators

Two in-line undulators (U2.3 & U3.3) together with optimized beamline optics and a high heat load double crystal monochromator provide 11-ID-D with high-flux monochromatic X-ray beam ( > 1013 photons/s) tunable from 6 keV to 25 keV with a beam size of 50 – 200 μm (v) x 400 μm (h) and an energy bandwidth of 0.01%.


Time Resolved X-Ray Absorption Spectroscopy

Time Resolved X-Ray Scattering

Time Resolved Grazing Incidence
X-Ray Scattering /X-Ray Absorption Spectroscopy

  • Oxidation state
  • Unoccupied electronic state
  • Number and species of neighbor atoms
  • Local geometric structure
  • Global electron density
  • Global shape
  • Movie with limited spatial resolution
  • Symmetry
  • Interfacial electron density
  • Symmetry at the interface
  • Roughness
  • Number of neighbors
Scientific Cases

Studying electronic and structural dynamics of  processes related to energy conversion and storage