Diffraction@KMC-2

Diffraction /KMC-2

The instrument is located at the KMC-2 beamline, which provides linearly polarized light in the energy range of 4 keV – 15 keV for X-ray absorption spectroscopies (EXAFS, XANES), fluorescence, diffractometry and reflectometry. Beam intensity is stabilized by MOSTAB electronics with an accuracy of 0.3 %. The instrument Diffraction@KMC-2 is a 6-circle goniometer in psi-geometry. The sample is mounted on a motorized stage that allows movement in all directions.

Anwendungsbeispiele:
  • Rietveld analysis of the low-temperature phase transitions of metalorganic perovskite semiconductors
  • Determination of cation distribution in sulfide semiconductors by anomalous powder diffraction and MEAD
  • High-temperature evolution of lattice misfits in high-entropy alloys
  • Structural analysis of gas adsorption into mesoporous metal–organic frameworks
  • Tensile stress and cracking behavior of metallic bi-layers on polymer substrates from sin2ψ analysis
Picture of Diffraction@KMC-2

Picture of Diffraction@KMC-2


Methods

Powder Diffraction, Single Crystal Diffraction, Surface Diffraction, Anomalous Scattering, Reflectivity, WAXS, Reflectometry

Remote access

depends on experiment - please discuss with Instrument Scientist

Instrument data
Location (Pillar) 11.2
Phone (~49 30 8062-) 14623
Source D9.2 (Dipole)
Beam availability 24h/d
Monochromator Si 111, Ge-graded
Energy range (at experiment) 4 - 15 keV
Energy resolution 1/4000
Flux 107 - 1010 [photons/s/100mA]
Polarisation linear horizontal
Focus size (hor. x vert.) 250 μm x 600 μm
Temperature range 20-1000 °C
Pressure range See additional equipment.
For more details contact the station manager.
Detector
  • Scintillation detector (Cyberstar)
  • Area detector (Bruker Vantec 2000), 2Θ angles up to 140° accessible
Manipulators Huber 6-circle goniometer
Sample holder compatibility See additional equipment.
For more details contact the station manager.
Additional equipment Modular Sample Environment available at KMC-2 include:

  • TMP-HTF-VAC-XRD, a custom-build Be-domed furnace with in-build turbopump for experiments up to 900 °C in ultra-high vacuum (10-6 mbar); this furnace is restricted to Θ-2Θ geometry.
  • TMP_HTF_IG_XRD, Anton Paar DHS 1100 furnace for experiments up to 1100 °C in air, inert gas or vacuum (10-4 mbar) without limitations on the movement of the goniometer.
  • TMP-CCR-HXR,  closed cycle refrigerator for low-temperature experiments (15 - 450 K) and controlled gas loading up to 150 kPa.
  • TMP-CJ-XRD, cryo-gas-jet for investigations of small samples at low temperatures (20 - 300 K) in controlled gas atmospheres up to 10 MPa.
  • TMP-SGJ-XRD, capillary system for experiments with small sample volumes at high temperatures (240 - 850 K) and controlled atmospheres up to 10 MPa.

Additional information Details beamline KMC-2

Instrument applications

  • Grazing incidence diffraction (GID)
  • Reciprocal space mapping of single crystal Bragg reflections
  • Diffuse scattering
  • Powder diffraction
  • Anomalous diffraction
  • Reflectometry

Remote Access details

Yes. Both control stations of KMC-2 diffraction can be operated remotely using NoMachine. The beamshutter still has to be opened manually.