This paper gives an overview of the current performances of the ESRF multi-segmented piezoelectric bimorph mirrors. These devices effectively combine the possibility of varying dynamically the average spherical bending radius with the capability of acting locally on the reflecting surface shape. A first generation consisting of two prototypes was completely characterized in the ESRF metrology laboratory and the mirrors are installed and fully operational on the ID26 and ID32 beamlines since October 1997. Results obtained during the characterization and the commissioning of these devices are presented. A second generation prototype mirror has been designed, manufactured, tested in the ESRF meteorology laboratory, installed and commissioned at ID26 in 1998. This last mirror exhibits sub- (mu) rad residual slope error rms in its central portion, 1 angstrom rms averaged microroughness a d can routinely achieve a vertical beam size as small as 7 micrometers FWHM at a focal distance of almost 3 m.

Date Published: 13 November 1998
PDF: 12 pages
Proc. SPIE 3447, Advances in Mirror Technology for Synchrotron X-Ray and Laser Applications, (13 November 1998); doi: 10.1117/12.331126

Published in SPIE Proceedings Vol. 3447:
Advances in Mirror Technology for Synchrotron X-Ray and Laser Applications
Ali M. Khounsary, Editor(s)