Berlin 2015 – scientific programme
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MI: Fachverband Mikrosonden
MI 10: Poster: Microanalysis and Microscopy
MI 10.6: Poster
Wednesday, March 18, 2015, 15:00–17:30, Poster B
Femtosecond speckle and coherence experiments at the CHG short-pulse facility at DELTA — •Christian Gutt1, Mario Reiser1, Sebastian Warsow1, Tushar Sant1, Svenja Hilbrich2, Maryam Huck2, Shaukat Khan2, Markus Höner2, Carsten Mai2, Arne Meyer auf der Heide2, Robert Molo2, Helge Rast2, and Peter Ungelenk2 — 1Department of Physics, Universität Siegen, Walter-Flex-Str. 3, Siegen, Germany — 2Center for Synchrotron Radiation, TU Dortmund, Maria Goeppert-Mayer Str.2, Dortmund, Germany
The interaction of femtosecond laser pulses with relativistic electrons in an undulator can yield very short and coherent pulses of higher harmonic radiation (coherent harmonic generation, CHG). Using the CHG facility at the synchrotron radiation source DELTA; we performed single-pulse diffraction and speckle experiments with femtosecond pulses of optical and UV light of wavelengths of 400 and 200 nm, respectively. The properties of the speckle patterns allow to deduce the coherence properties of the CHG radiation on a shot-to-shot basis. We find a high degree of spatial and temporal coherence of the CHG-generated radiation compared to the coherence properties of the spontaneous undulator radiation.