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- ID10 - Soft interfaces and coherent scattering beamline
ID10 is a multi-purpose, high-brilliance undulator beamline. Endstation EH1 is for high-resolution X-ray scattering and surface diffraction on liquid and solid interfaces, combining multiple techniques in a single instrument. Endstation EH2 is for coherent small-angle X-ray scattering, X-ray photon correlation spectroscopy and coherent diffraction.
ID10EH1 Users Guide
ID10EH2 Users Guide
EH1 experimental station
With the techniques of GID, XRR and GISAXS, length scales from sub-nm to 100 nm, in some cases even up to 1000 nm, can be explored. This allows to investigate the structure and self-organization processes at surfaces, interfaces and in thin films both in-plane and normal to the film. Among the applications are studies of:
EH2 experimental station
X-ray photon correlation spectrsocopy (XPCS) is a technique based on quantifying the temporal correlations in a fluctuating speckle pattern produced in the far-field by a coherent X-ray beam. XPCS allows the study of slow in-equilibrium and out-of-equilibrium dynamics in disordered or modulated materials on timescales beyond the reach of the inelastic (X-ray or neutron) techniques. XPCS is complementary to dynamic light scattering (DLS) and typically covers a time window of 10-8 s < t < 1000 s. The combination of small-angle (SAXS) and wide-angle (WAXS) scattering allows to cover length scales from several thousand Angstroms (Q ~ 10-3 Å-1) down to atomic resolution (Q ~ 1 Å-1).
Examples of applications are:
CXDI is a lens-less imaging method where the electron density distribution in real space is obtained by phasing an oversampled speckle pattern in reciprocal space recorded in the far field via an iterative phase retrieval algorithm. Imaging of non-crystalline 3 micron objects can routinely be performed at 18 nm resolution in 3D at 8KeV.
The target of CXDI is high resolution imaging of:
EH1 experimental station
A versatile 8-circle diffractometer (2 (detector) + 3 (sample V-stage)+3 (sample H-stage)) at EH1 with a variable resolution set-up on the detector side (slits and crystal analysers) together with the available energy tunability permits virtually every diffraction experiment in horizontal or vertical scattering geometry.
The EH1 instrumentation is compatible with GISAXS ,GID and XRR geometries in horizontal or vertical scattering geometry. The setup is optimized for experiments on liquid and fluid surfaces which are a particular specialty of the EH1 end station. A temperature and atmosphere controlled Langmuir trough integrated with active an antivibrational system is available at the beamline. Scattering profiles can be taken with either a 0-D detector or a 1-D detector.
EH2 experimental station
XPCS can be performed in the geometries:
- SAXS (7-10 keV, 21-24 keV), Q min: 10-3Å-1. Standard SAXS profile can be taken with either a 0-D detector or a 2-D detector. The setup is optimized for dynamic XPCS experiments employing a coherent X-ray beam and not for high through-put SAXS data acquisition.
- WAXS (7-10 keV), Q max: 3 Å-1
- Bragg (7-10 keV), Q max: 3 Å-1
- Grazing incidence (7-10 keV)
The Time-correlation functions can be recorded with help of a digital autocorrelator (0D) or by a in-house multi-tau software correlator (2D).
The high resolution goniometer with on-axis microscope is used for samples in air on with samples on Si3N4 membranes. The setup is compatible with a cryo-stream for cryo protection of frozen hydrated biological samples. Up to 7 meters sample to detector distance allows measuring oversampled far-field diffraction patterns from up to 7 microns big object with the Maxipix 2x2 pixel detector.
3D reconstructions can be retrieved almost "on-line" by an in-house software.
The EH2 instrumentation is compatible with Grazing-incidence (GID) and Grazing-incidence Samll-angle scattering (GISAXS) geometries in horizontal or vertical scattering geometry allowing in particular also experiments on liquid surfaces.
Complementary Information