- Experiment & Sample preparation
- Data Analysis
Welcome to power diffraction at SESAME
The SESAME MS beamline is based on components previously installed at the Swiss Light Source donated to SESAME by the Paul Scherrer Institute. It is used for X-Ray Powder Diffraction (XRPD) applications. Its flexible optical design spans a wide energy range of the order of 5 to 25 keV. A two-circle goniometer installed in the experimental hutch accommodates standard XRPD experiments.
The XRPD technique of the MS beamline may be applied to material phase identification, quantitative analysis, atomic structural determinations, and the characterization of material microstructural properties such as structure imperfections, domain size determination, and kinetic studies.
This beamline, which has been hosting users since December 2020, may be used in a wide range of research fields stretching from materials science and engineering to chemistry, physics, and archeometry.
MS is based on a wiggler source operated at 12 mm magnetic gap equivalent to 1.38 T. the flux produced from the wiggler is high compared to a bending magnet source. The main components of the front end are
- Fixed mask for defining the beamline acceptance angles
- Photon shutter to stop the photon beam whenever necessary
- Rotating filter
- White beam slits
- Radiation stopper
The MS beamline optical layout consist of a cylindrically collimated Rhodium coated mirror fixed aligned to 3 m rad grazing angle. Then Kozhu Si (111) double-crystal fixed exit monochromator is located to select the energy, with second sagittal crystal to focus the beam horizontally at the sample location. Then a second cylindrical Rhodium coated mirror to focus the beam vertically.
The MS experimental station is based on a refurbished two circle diffractometer previously was installed at I19 beamline at Diamond synchrotron. The inner rotary (theta) is for the sample rotation while the second rotary (2theta) is for the detector rotation. A homemade spinner for transmission experiments is fixed on a translational XY stage attached on the theta rotary.
Pilatus 300K detector (donated by DECTRIS company) is the main detector in use at MS end station, it has a very good time resolution together with a reasonable angular resolution gained by fixing the detector at 740 mm distance from the sample.
Heating and cooling samples in capillaries are possible at MS using hot gas blower and liquid nitrogen cryostat respectively, moreover further sample environmental stages can be added the experimental station.
optical surface facing up
optical surface facing down
Dectris Pilatus 300K
- Powder samples filled in glass capillaries (Boro Silicate for room temperature; Quartz for temperature dependent)
- Capillary spinner
- Gas blower for temperature dependent experiments (RT – 1000 C)
- Liquid nitrogen cryostat
- Output data type as 2D images
- DAWN software for image processing to convert 2D to Ascii (xy) files
- Phase software for phase matching analysis is available
- PDF-4 database
- GSAS software for structural analysis
- FullProf software for structural analysis
The SESAME materials science beamline for XRD applications
Powder Diffraction, Vol. 32 - S1, pp. S6-S12 (2017)
M Abdellatief, L Rebuffi, H Khosroabadi, M Najdawi, T Abu-Hanieh, M Attal, G Paolucci
MS Beamline Principal Scientist
Work Tel: +962 5 351 1348 (Ext. 275)
Mobile: +962 79 750 6794