Adaptive silicon monochromators for high power insertion devices: Tests at CHESS, ESRF, and HASYLAB (abstract) Available to Purchase

X‐ray wigglers which produce tens of kilowatts of photon power within the white beam will soon become available as third‐generation sources of synchrotron radiation. Insertion devices that produce several kilowatts already exist and we have used those at CHESS, ESRF, and HASYLAB to test and develop an adaptive 111 silicon water jet‐cooled monochromator at up to 2 kW total incident beam power. This development of earlier work at the Brookhaven National Synchrotron Light Source uses the pressure in the water coolant to provide active compensation of the strain field in the thermal footprint, nulling its effect to within residual variations in the Bragg angle of only a few seconds of arc. The design is robust, vacuum compatible, and uses no moving mechanical parts.