The source is located at a high-ß section of the storage ring. Two undulators U21.4  and one U35 provide high photon flux with a low divergence. Only the central radiation cone of the undulator is used. Unless otherwise stated, all beam sizes correspond to FWHM values. The beamline optics consist of a cryogenic (liquid nitrogen) cooled Si-111 channel-cut monochromator and a double mirror focusing setup. The standard beam size is 40 µm x 600 µm (vertical and horizontal, respectively) with divergence of 20 µrad x 30 µrad. The beamline is optimised for experiments using a fixed wavelength around 0.1 nm (12.4 keV), but a wavelength range between 0.073 nm and 0.16 nm is accessible. The maximum photon flux at the sample position is of the order of  5 x 1013 photons/sec/100 mA with Δλ/λ = 0.015 % at 12.4 keV.

[1] T. Narayanan, M. Sztucki, P. Van Vaerenbergh, J. Le´onardon, J. Gorini, L. Claustre, F. Sever, J. Morse and P. Boesecke, J. Appl. Cryst., 51, 1511 (2018);

[2] P. Van Vaerenbergh, J. Le´onardon, M. Sztucki, P. Boesecke, J. Gorini, L. Claustre, F. Sever, J. Morse, and T. Narayanan,  AIP Conf. Proc., 1741, 030034 (2016).


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