Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 26: Anwendung ultrakurzer Lichtimpulse II

Q 26.7: Talk

Tuesday, March 20, 2007, 15:30–15:45, 5K

Wavefront measurement of high-order harmonics with a Hartmann-sensor — •Matthias Weger, Stefan Eyring, Jan Lohbreier, Robert Spitzenpfeil, Dominik Walter, and Christian Spielmann — University of Würzburg, Department of Physics, Am Hubland, 97218 Würzburg, Germany

High-order harmonics from gas provide an ultrafast, coherent, EUV and tabletop light source. We measure the wavefront aberrations stemming from the generation process and the propagation over reflective optics of the harmonics.

We present an experimental setup and first measurements, which use a Hartmann-sensor for radiation in the EUV to measure the wavefront of high-order harmonics. A pinhole array aperture is placed in the beamline. From the pattern recorded with a x-ray CCD-camera the wavefront can be reconstructed and developed in Zernike polynomials, which correspond to basic optical aberrations.

Future measurements can be made at any desired position of the EUV beamline.