X-Ray Diffraction Facility: WAXS

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X-ray diffraction from a bent-core liquid crystal material in the SmC and crystal phases.

Wide-Angle X-Ray Scattering System

A custom-built wide angle x-ray scattering (WAXS) system with a Huber 4-circle goniometer capable of accommodating large sample chambers (such as temperature-controlled ovens), this diffractometer is used routinely for structural characterization of liquid crystalline, polymeric and biological materials, x-ray reflectivity measurements on thin films, and high-resolution powder diffraction of polycrystalline materials.

Features

  • X-ray source: 18 kW Rigaku rotating anode x-ray generator (Cu anode, wavelength = 1.54 Å)
  • Monochromator: bent graphite
  • Beam size at sample: 1 x 1 mm2 (adjustable to 1 x 3 mm2)
  • Optics: 4 sets of motorized and 1 set of manual vacuum slits for adjusting resolution
  • Flight tubes: evacuated
  • Detector: high sensitivity scintillation detector (Crismatec)
  • Goniometer: large Huber 4-circle
  • Sample stage: motorized X-Y-Z stage
  • Special stage holder: temperature controlled (0 - 200oC) sample holder for reflectivity and diffraction measurements
  • Flux: ~ 107 photons/second
  • Typical range of length scales probed: 2 Å - 200 Å
  • Computer: Linux PC
  • Software for data collection: SPEC

This diffractometer system is available by appointment for research and training for CU and outside users.

 

For more information about the x-ray diffraction facility, contact Rayshan Visvanathan.

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