The optics beamline at the Swiss Light Source

We present the successful installation and the performance of a new beamline for optics and instrumentation research and developments at the Swiss Light Source. The beamline covers the photon energy range from 5.5 to 22.5 keV at a bending magnet with a cryogenically cooled Si(l 11) channel cut monochromator followed by a bendable toroidal mirror with 1:1 focusing. Monochromator and focusing mirror can be retracted independently to allow monochromatic and pink beam mode with and without focusing. In focused monochromatic mode we measured a usable photon flux of 2 x 10(11) photons/s at 11 keV within a focus of 70 mu m x 140 mu m (FWHM v x h). The higher order contamination has been determined with absorption foils. We measured 0.025% of second order light at 9 keV and 17% of third order contamination at 6 keV. In pink beam mode we measured with a thermopile sensor a radiation power of 10.6 W for 1 mrad acceptance. (C) 2009 Elsevier B.V. All rights reserved.