KMC-2 Diffraction

KMC-2 Diffraction

The instrument Diffraction is a 6-circle goniometer in psi-geometry. The sample is mounted on a motorized stage that allows movement in all directions. Two detectors are available: A scintillation detector (Cyberstar) and an area detector (Bruker Vantec 2000). 2Θ angles up to 140° are accessible with the area detector. The instrument is located at the KMC-2 beamline, which provides X-ray radiation with very stable energies in the range between 4 and 14 keV. This combination covers most scattering requirements.

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


Methods

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

Remote access

depends on experiment - please discuss with Instrument Scientist

Beamline data
Energy range 4 - 15 keV
Energy resolution 1/4000
Flux dipole, 1e7 - 1e10
Polarisation linear horizontal
Focus size (hor. x vert.) 250 μm x 600 μm (4.8 μm x 4.8 μm with capillary optics; at XANES only, not available at Diffraction)
Phone +49 30 8062 14623
Weitere Details KMC-2
Station data
Temperature range 20-1000 °C
Pressure range Check text. For more details contact the station manager.
Detector Scintillator, Area (Bruker Vantec 2000)
Manipulators Huber 6-circle goniometer
Sample holder compatibility Check text. For more details contact the station manager.
Additional equipment
  • 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 1000 kPa.
  • TMP-SGJ-XRD: capillary system for experiments with small sample volumes at high temperatures (240 - 850 K) and controlled atmospheres up to 1000 kPa.

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. For low-temperature diffraction without gas pressure it is typically operated with Kapton windows instead of Beryllium domes, limiting the lowest temperature to 22 K. This system is intended for extensive experiments on a low number of samples, as it is not fast (sample changes take about 1 hour, complete cooling down about 3 hours).
  • 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.
  • TMP-PEC-XRD, a Peltier-cooled dome for fast temperature changes around ambient temperature (240 - 370 K)

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.