ID09

Synopsis

Beamline for experiments with a time resolution down to 100 picoseconds. Structural change is initated by short laser pulses and the structural changes are probed by delayed x-ray pulses. Set-up includes unique x-ray optics for making intense white beams.
Status:  open

Disciplines

  • Life Sciences
  • Chemistry
  • Physics
  • Materials and Engineering

Applications

  • Protein dynamics in crystals
  • Time-resolved Laue diffraction with laser-initiated crystals
  • Protein dynamics in solution initiated by flash photolysis
  • Chemical dynamics in solution
  • Small-molecule structures probed in time along with the hydrodynamics of the solvent
  • Surface melting and surface reactions probed by grazing incidence reflectivity, diffraction and scattering

Techniques

  • XRD - X-ray diffraction
  • WAXS - wide-angle X-ray scattering
  • SAXS - small-angle X-ray scattering
  • GID - grazing incidence diffraction
  • Laue diffraction

Energy range

  • 8.5 - 28.0  keV

Beam size

  • Minimum (H x V) : 90.0 x 50.0  µm²
  • Maximum (H x V) : 250.0 x 100.0  µm²

Sample environments

  • 1-circle diffractometer with x, y and z sample position
  • 2-circle cradle available upon request
  • Liquid nitrogen jet for sample cooling (85-320K)
  • Laminar jet for rapid sample exchange

Detectors

  • FReLon CCD detector (2048 x 2048) - pixel size: 50 x 50 um2, detection area: 105 x 105 mm2 (phosphor screen), readout in 0.53 s/image at 16 bits
  • Cyberstar scientilation detector for single-pulse x-ray dianostics
  • GaAs photo detector for single-pulse x-ray and laser dianostics
  • Diamond detector for single-pulse diagnostics
  • PIN diode detectors for intensity measurements
  • Autocorrelator for pulse profile measurements of laser pulses (0.1 ps resolution, range 0-5 ps)

Technical details

ID09 permits time-resolved diffraction for single and poly crystals, as well as Laue diffraction. One unique feature is the intense pink beam from the in-vacuum undulator U17. The U17 is a "single-harmonic" undulator tunable between 15 and 20 keV. The raw undulator spectrum, which is asymmetric in shape, has a bandwidth of 3%. The spectrum can, if needed, be made symmetric with multilayer crystals (1-3% bw). Narrow bandwidths are also avaiable from a conventional channel-cut silicon monochromator (Si111). The chopper system can make 100 picosecond, microsecond or millisecond pulses.

[1] M. Wulff, A. Plech, L. Eybert, R. Randler, F. Schotte, P. Anfinrud, "Realisation of sub-nanosecond pump and probe experiments at the ESRF", Proceedings of the Faraday Discussion 122 (2002) 13-26. [2] M. Cammarata, F. Ewald, L. Eybert, W. Reichenbach, M. Wulff, P. Anfinrud, F. Schotte, Q. Kong, B. Lindenau, J. Rabiger, S. Polachowski, "Chopper system for single pulse experiments with synchrotron radiation", Review of Scientific Instruments, 80 (2009) 015101-015111.