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Title |
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| TUBAU03 |
Cross-Correlation between a VUV-FEL and an Optical Laser
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291 |
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- Th. Maltezopoulos, U. Fruehling, E. Plönjes
DESY, Hamburg
- C. Cunovic, N. Mueller
Universität Bielefeld, Bielefeld
- M. Drescher, R. Kalms, M. Krikunova, M. Wieland
Uni HH, Hamburg
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At the Free Electron Laser in Hamburg (FLASH) a synchronized 800 nm optical laser is available for time-resolved VUV/vis pump-probe experiments. We crossed both femtosecond pulses in a Kr gas target and imaged the created photoelectrons with an energy-dispersive electron spectrometer. In the region where both pulses overlap in space and time, the photoelectrons are energetically shifted and form spectral sidebands. The imaging electron spectrometer projects the spectral- into an intensity modulation, thus, mapping time into space. This way, the technique delivers information about the relative timing between VUV- and visible pulse and is non invasive for both pulses. While observation of the cross-correlation signal currently requires data-averaging, with proper focussing single shot capability shall be reached, thereby enabling pulse-to-pulse jitter measurements.
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