ID09 - White Beam Station - Time-resolved Beamline

Synopsis

Beamline for experiments with a time resolution down to 100 picoseconds. Structural changes are initated by short laser pulses or rapid mixing of liquid solutions and are probed by delayed x-ray pulses. Set-up includes unique x-ray optics for intense polychromatic X-ray beams.

Disciplines

• Chemistry
• Life Sciences
• Physics
• Materials and Engineering

Applications

• Chemical dynamics in solution
• Protein dynamics in solution and crystals
• Surface melting and surface reactions probed by grazing incidence reflectivity, diffraction and scattering

Techniques

• GID - grazing incidence diffraction
• Laue diffraction
• SSX - synchrotron serial crystallography
• WAXS - wide-angle X-ray scattering
• XES - X-ray emission spectroscopy
• XRD - X-ray diffraction

Sample environments

• 1-circle diffractometer with x, y and z sample position
• Liquid jet circulation system
• Flow-through capillary circulation system
• Stopped-flow system
• Liquid nitrogen jet for sample cooling (100-320K)

Detectors

• Rayonix MX170-HS CCD detector
• GaAs and MSM photodetectors for single-pulse x-ray and laser diagnostics
• Diamond detector for X-ray single-pulse diagnostics
• PIN diode detectors for intensity measurements

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.