As part of the COST P7 Action, the metrology facilities of four European synchrotrons – Bessy, Elettra, ESRF and Soleil – instigated a round-robin programme of instrument inter-comparison. Other synchrotrons will later join this programme. The metrology instruments involved are various direct slope measurement devices, such as the well known Long Trace Profiler (either custom built or modified from commercial devices) and the Bessy Nanometer Optical component measuring Machine (NOM). The round robin was realized by measuring two flat and three spherical mirrors (made of either Zerodur or fused silica) made available by Bessy, Elettra and Soleil. The programme has been a significant aid in the characterization of each of the instruments and could readily be extended to other devices as a calibration tool. The results and advantages are described in this chapter.
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Rommeveaux, A., Thomasset, M., Cocco, D., Siewert, F. (2008). The COST P7 Round Robin for Slope Measuring Profilers. In: Erko, A., Idir, M., Krist, T., Michette, A.G. (eds) Modern Developments in X-Ray and Neutron Optics. Springer Series in optical science, vol 137. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74561-7_14
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