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.

Status: open

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

Energy range

8.0 - 24.0 keV

Beam size

Minimum (H x V) : 25.0 x 25.0 µm²
Maximum (H x V) : 100.0 x 100.0 µm²

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.