Automatic alignment of a Kirkpatrick-Baez active optic by use of a soft-x-ray Hartmann wavefront sensor

Pascal Mercere (1) , Mourad Idir (1) , Thierry Moreno (1) , Gilles Cauchon (1) , Guillaume Dovillaire (2) , Xavier Levecq (2) , Laurent Couvet (2) , Samuel Bucourt (2) , Philippe Zeitoun (3)

1 SSOLEIL - Synchrotron SOLEIL
2 Imagine Optic
3 LOA - Laboratoire d'optique appliquée

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 µm×9 µm FWHM focal spot.

Domains: Optics [physics.optics]

Pascal Mercere, Mourad Idir, Thierry Moreno, Gilles Cauchon, Guillaume Dovillaire, et al.. Automatic alignment of a Kirkpatrick-Baez active optic by use of a soft-x-ray Hartmann wavefront sensor. Optics Letters, 2006, 31 (2), pp.199-201. ⟨10.1364/OL.31.000199⟩. ⟨hal-00521853⟩