title: Automatic alignment of a Kirkpatrick-Baez active optic by use of a soft-x-ray Hartmann wavefront sensor.
abstract: We present what we believe to be the first automatic alignment of a synchrotron beamline by the Hartmann technique. Experiments were performed, in the soft-x-ray range (E=3 keV, lambda=0.414 nm), by using a four-actuator Kirkpatrick-Baez (KB) active optic. A system imaging the KB focal spot and a soft-x-ray Hartmann wavefront sensor were used alternatively to control the KB optic. The beam corrected with the help of the imaging system was used to calibrate the wavefront sensor. With both closed loops, we focused the beam into a 6.8 microm x 9 microm FWHM focal spot.
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers-Saint-Aubin, Gif sur Yvette, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Mercère
authors.forename: Mourad
authors.initials: M
authors.lastname: Idir
authors.forename: Thierry
authors.initials: T
authors.lastname: Moreno
authors.forename: Gilles
authors.initials: G
authors.lastname: Cauchon
authors.forename: Guillaume
authors.initials: G
authors.lastname: Dovillaire
authors.forename: Xavier
authors.initials: X
authors.lastname: Levecq
authors.forename: Laurent
authors.initials: L
authors.lastname: Couvet
authors.forename: Samuel
authors.initials: S
authors.lastname: Bucourt
authors.forename: Philippe
authors.initials: P
authors.lastname: Zeitoun