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J Synchrotron Radiat. 2011 May;18(Pt 3):515-21. doi: 10.1107/S0909049511008624. Epub 2011 Mar 19.

Geometrical layout and optics modelling of the surface science beamline station at the SESAME synchrotron radiation facility.

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Synchrotron Light for Experimental Science and Application in the Middle East, PO Box 7, Allan 19252, Jordan.


The layout and the optical performance of the SGM branch of the D09 bending-magnet beamline, under construction at SESAME, are presented. The beamline is based on the Dragon-type design and delivers photons over the spectral range 15-250 eV. One fixed entrance slit and a movable exit slit are used. The performance of the beamline has been characterized by calculating the mirror reflectivities and the grating efficiencies. The flux and resolution were calculated by ray-tracing using SHADOW. The grating diffraction efficiencies were calculated using the GRADIF code. The results and the overall shapes of the predicted curves are in reasonable agreement with those obtained using an analytical formula.


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