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Beamline 11-ID-D: Sector 11 - Time Resolved X-ray Spectroscopy and Scattering

X-ray Science Division, APS
Chemistry, Environmental Science, Materials Science


The beamline provides time-resolved (TR) X-ray absorption spectroscopy (XAS) and scattering (XS) tools to visualize ultrafast structural dynamics during processes related to energy conversion or storage. Two inline undulators together with optimized beamline optics and a high heat load double-crystal monochromator provide 11-ID-D with high flux X-ray (10E13/photons/sec) tunable from 6 keV to 25 keV. A laser hutch next to D station hosts two laser systems, providing intense laser pulses as the excitation source.


Supported Techniques

  • Time-resolved x-ray absorption fine structure
  • Time-resolved x-ray scattering
  • General diffraction

Beamline Controls and Data Acquisition

Linux-EPICS, SPEC, MacOS, and Windows EPICS.


  • Pilatus 2M
  • Ionization chambers
  • Avalanche photodiodes

Additional Equipment

  • fs Ti:Sapphire laser (10W, 3/10 kHz) k
  • ps Nd:YLF laser (2W, 1-2 kHz)
  • Optical parametric amplifier (pumed by fs laser)
  • TR XAS sample chamber
  • Huber 6-circle goniometer

Local Contacts

Phone 630.252.0366

Beamline Specs

Source (upstream)

3.3 Undulator (Undulator A)

Source (downstream)

2.3 Undulator

Monochromator Type


Energy Range

6-25 keV

Resolution (ΔE/E)

1 x 10 -4

Flux (photons/sec)

3 x 1013 @12 keV

Beam Size (HxV)


450µm x 50µm

For additional information see:

Current Status:

Operational/Accepting General Users

Access Mode: