Benjamin Krueger, Bruker Applications Scientist
Wednesday, March 4th, 2020
10am–12pm Background and demonstration (Bring laptops)
1pm–4pm Data analysis workshop (Bring laptops)
12-0168, MIT.nano (basement level)
Workshop details Bruker LEPTOS software to:
• Analyze HRXRD measurements for in-plane and out-of-plane strain, composition and defect density of epitaxial thin films
• Simulate and fit data in direct and reciprocal space using advanced X-ray scattering theories and numerical methods for estimation
• Parameterize any type of thin film and build your specific crystal structure model using the extendable material database
The Bruker GADDS now has a Cobalt anode to provide low background 2D XRD data of Fe or Co containing samples while mitigating the fluorescence issues associated with a Cu target. Also, an Oxford Cryosystems Cryostream 700 has been outfitted to the Bruker GADDS system to provide variable temperature XRD down to 77º K. Contact Charles Settens for training.
The MIT MRSEC has committed to supporting lab-based Small Angle X-ray Scattering (SAXS) in the X-ray Diffraction Shared Experimental Facility. The Institute for Soldier Nanotechnologies SAXS system has been moved to the X-ray facility and is currently being upgraded by MRL to support research programs that would benefit from an X-ray nanoprobe sensitive to size scales from 0.5 – 200 nm. The planned upgrades include a vacuum compatible DECTRIS PILATUS 300K detector, automated sample to detector distance positioning, tunable scatterless collimation slits, a HUBER single circle segment for GI-SAXS stage - all controlled by spec. Contact Charles Settens for training on the SAXS system.
In addition to single crystal structure refinement, the Chemistry Department’s Diffraction Facility now offers transmission-mode powder diffraction at temperatures from 100K to 500K. Transmission mode diffraction gives rise to high-quality powder patterns from minute amounts of sample (only ca. 2 cubic millimeters of tightly packed powder are needed) and the variable temperature setup, which is unique on MIT campus, allows the examination of many phase transitions. In addition, the user has the choice of copper and molybdenum radiation (Mo radiation reduces fluorescence in samples containing Co or Fe). The quality of the powder data collected in the facility is generally high and on several occasion was good enough for Rietveld refinement. For further information contact Peter Mueller or see here: http://web.mit.edu/x-ray/powder.html.
This instrument is currently working. Training for this system will be one-on-one and must be pre-arranged with staff. Please send an email expressing your interest and the nature of your samples to Charles Settens.
If you would like to visit the old website, it has been moved to prism.mit.edu/xray/oldsite.