Following a successful collaboration experience with ALBA for two mirror systems in KB configuration for the XALOC beamline in 2010, IRELEC proposes mirror holders (applicable to flat mirrors as well as for dynamically-figured mirrors) that make it possible to compensate the mirror substrate long-period slope error by using calibrated and accurate push-and-pull actuators placed in specific positions along the mirror.

This device is particularly intended to minimize the beam spot striation effect at the sample position when operating the beamline in a defocused mode (for instance, when the sample is set out of the focus so that the beam size matches the sample size).

It is adaptable to flat and bent mirrors of any mirror length (classically between 200 mm and 1.5 m).

It was successfully implemented on 4 bent mirrors for the CoSAXS beamline at MAX IV, allowing to achieve sub-nanometer shape errors on 0.5 m long silicon mirrors.