Hannover 2010 – scientific programme

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MO: Fachverband Molekülphysik

MO 29: Poster: Experimental Techniques

MO 29.4: Poster

Thursday, March 11, 2010, 16:00–18:30, Lichthof

Towards synchronization of a highly repetitive multi-frequency laser system with PETRA III for pump-probe experiments — •Moritz Schlie, Armin Azima, Maria Krikunova, Marek Wieland, and Markus Drescher — Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

For enabling laser/X-ray pump-probe experiments on molecules at the new PETRA III synchrotron radiation facility at DESY, a synchronized laser system is being set up. Wavelengths ranging from 210 nm to 2600 nm are delieverd at a high repetition rate of 130 kHz, thus allowing highly efficient experiments with flexible excitation schemes. The system is based on a commercial diode-pumped Yb:KGW laser with 6 W output power followed by an Optical Parametric Amplifier and Harmonic Generation modules. The laser repetition rate will be synchronized with one electron bunch within the 40-bunch operation mode of the storage ring. To this end, two phase locked loops (PLL) will lock the lasers’s oscillator frequency (83 MHz) and its 6th harmonic to the PETRA III master oscillator (500 MHz) and its 6th subharmonic. Test results of the synchronization loop will be presented.