Jerome B. Cohen X-ray Diffraction Facility

Cook Hall, 1016
Tel: (847) 491-7810
Facility Director: Michael Bedzyk, MSE
Facility Manager: Jerry Carsello

Visit the J.B. Cohen X-ray Diffraction Facility on the World Wide Web at: http://xray.facilities.northwestern.edu/

FUNCTION: The primary function is to provide general-purpose x-ray equipment for diffraction and fluorescence studies. The facility can also make provide equipment for non-routine experiments such as, special attachments for high and low temperatures, vacuum or protective atmospheres, monochromators, special detectors, etc. Examples of current measurements are: powder diffraction, single-crystal diffraction, thin-film reflectivity, thin-film diffraction, crystal truncation rod scattering, small angle scattering, Laue diffraction, pole figures, EDX-ray Fluorescence, x-ray standing waves, high-resolution x-ray diffraction, and grazing incidence small angle scattering.

EQUIPMENT: There are presently thirteen experimental x-ray stations available, four of which have rotating anode sources.

COMPUTERS AND SOFTWARE: All of the x-ray stations operate via networked PC's with software that allows for control via stepping motors and data collection via counters. A networked printer and wireless network are provided. ICDD database, JADE diffraction analysis, CaRine crystal builder simulation and Laue diffraction software packages are available. SPEC, NEWPLOT and CPLOT are available on five of the stations.

AVAILABLE APPARATUS:
- Rigaku ATX-G Thin-film Diffraction Workstation: A high intensity 18kW copper x-ray source is coupled to a multilayer mirror. The system has selectable x-ray optical configurations suitable for work with single crystal, thin-film or poly-crystalline film samples. Also supported are grazing incidence, in-plane diffraction geometries, pole figures and reciprocal space mapping. Other features are the 5-axis goniometer with several 4-crystal monochrometers that couple to the multilayer mirror.

- Rigaku S-MAX 3000 High Brilliance SAXS System Rotating anode with multilayer mirror, Bruker Vantec 2000 2-D detector, SAXS-GISAXS, WAXS capabilities including high/low temperature. q(min) = 0.01Å-1

- 18kW Mo Rigaku: High-resolution 4-circle diffractometer with Osmic Max-Flux multi-layer mirror, coupled to Si or Ge monochromator, SPEC software control, high-count rate scintillation detector, automated beam attenuator and multi-channel analyzer fluorescence spectroscopy system.

- 12kW Cu Rigaku: High-resolution 2-circle diffractometer with Osmic Max-Flux multi-layer mirror, coupled to Si or Ge monochromator, SPEC software control, high-count rate scintillation detector, automated beam attenuator and multi-channel analyzer fluorescence spectroscopy system.

- 18kW Rigaku: Medium resolution 4-circle diffractometer with SPEC software control and automated beam attenuator.

- Scintag XDS2000: Automated diffraction system, with four-circle pole-figure and residual stress device, thin film diffraction attachment and solid-state detector.

- Rigaku Dmax: Automated powder diffraction stations featuring Jade Analysis software.

- PC data analysis workstation: JADE 9.0 powder diffraction analysis software, CaRine diffraction simulation software, ICDD powder diffraction database and Laue analysis with digital scanner and Orient Express analysis software.

- Blake High Resolution tangential goniometer: 5-Bounce high-resolution rocking curve/scan system. Sealed tube x-ray source.

OTHER AVAILABLE EQUIPMENT:
- A variety of x-ray anode targets and source sizes to accommodate the four high intensity rotating anode generators and the nine sealed- tube x-ray generators.

- Various Si, Ge, Graphite and LiF crystals and multi-layer mirrors are available for incident or diffracted beam monochromators.

- Environmental chambers for vacuum, atmosphere, low temperature (>2 K) or high temperature (<2300 K) operation.

- Seven solid-state detectors including a Vortex high count rate detector with associated electronics, SCA's and MCA's.

- Three gas-filled 1-dimesion linear position sensitive detectors.

- Variety of image plate and x-ray film cameras: Laue, rotating crystal, cylindrical, topographic, Buerger precession, Guinier, Debye-Scherrer.