Seminars Archive

The SESAME Materials Science Beamline

Abstract
The SESAME synchrotron radiation laboratory (located in Allan, Balqa, Jordan) is a third generation synchrotron facility, will be operated at 2.5 GeV and 400 mA [1]. The SESAME Materials Science (MS) beamline is one of the first four beamlines, together with IR, XAFS/XRF and Macromlecular Crystallography. Its commissioning will begin in 2017. The MS beamline is the first insertion device beamline in SESAME and it will be dedicated to X ray diffraction experiments and applications in materials science. The radiation source is a wiggler consits of array of NdFe:B permnant magnets [2] arranged periodically along 2 m length. The SESAME MS wiggler, front-end and optical components [2] were donations from the Materials Science beamline at the Swiss Light Source SLS. The instrumentation became available when the SLS beamline went through a complete upgrade in 2009. Although the beam line components were already operated in SLS, some modifications to the beam line design have been necessary, due to technical and machine differences between SLS and SESAME. The SESAME MS energy range is 5-25 keV with 5.8 keV critical energy corresponding to 12 mm magnetic wiggler gap. The beamline ray tracing calculations at 10 keV estimate the flux at the sample to be in the order of 1012 (photons/s), the energy resolution is about 2 eV and the minimum spot size of 800 x 300 μm2. The experimental station will be completely new, and will be mainly dedicated to in-situ x-ray diffraction experiments requiring high time resolution coupled with some flexibilities to allow different sample enviroment (e.g. heating, cooling, high pressure, gas flow, etc.) to follow structural kinetics and phase transformations with subsecond time resolution. Microstructure investigation by high angular resolution line profile analysis will also be possible. [1] Smith C. L., Nature Photonics, 2015, 9, 550. [2] Patterson B. D, Abela R., Auderset H. , Chen Q., Fauth F., Gozzo F., Ingold G., Kühne H., Lange M., Maden D., Meister D., Pattison P., Schmidt Th., Schmitt B., Schulze-Briese C., Shi M., Stampanoni M., Willmott P.R., Nuclear Instruments and Methods in Physics Research A, 2005, 540, 42.