Experimental results from a water-cooled monochromator with micro-channels on an ESRF wiggler beamline

Abstract

A water-cooled monochromator with micro-cooling channels has been tested on a wiggler beamline at the European Synchrotron Radiation Facility. The device consists of a thin silicon wafer bonded to the grooved surface of a thick block of silicon. At low total power (330 W) and high power density (1.7 W/mm2) the broadening of the Si 333 rocking curve at 21 keV was less than 1 arc sec when compared with the width at 1 mA. At high total power (1.4 kW) and low power density (0.5 W/mm2) the broadening of the 111 reflection at 13 keV was approximately 2.5 arc sec with respect to the low heat-load case.