Optics of a high power wiggler beamline at the European Synchrotron Radiation Facility

The materials science beamline (BL2) at the European Synchrotron Radiation Facility (ESRF) can provide monochromatic or white radiation in the energy range from 7 to 100 keV. The source is a multipole wiggler with a maximum critical energy of 29 keV, producing a radiant power of up to 5 kW. The main optical elements are an adaptive mirror, a monochromator with a liquid nitrogen cooled first crystal followed by a sagittally bent second crystal, and a second mirror including a bender for vertical focusing. The general layout as well as the performance of the beamline optics during the commissioning phase of the ESRF are presented.