A
custom-built wide angle x-ray spectrometer with a large 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 crystal, polymeric and biological materials, x-ray reflectivity
measurements on thin films, and high-resolution powder diffraction of
polycrystalline materials. We plan to build a Small Angle X-ray Spectrometer
(SAXS) using the second port of the Rigaku x-ray generator.
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 1x3 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
The XRD system is available
by appointment for research and training for CU and outside users.
To schedule time on the instrument contact Chris Jones, the director of the facility
(tel: (303) 492-3719).
