Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Interaction with strong or short laser pulses I
A 18.5: Vortrag
Mittwoch, 16. März 2011, 17:30–17:45, BAR 106
Pump-probe scattering experiments on exploding rare gas clusters at LCLS X-FEL — •Tais Gorkhover1, Marcus Adolph1, Daniela Rupp1, Sebastian Schorb1, Thomas Möller2, Robert Hartmann4, Daniel Rolles3, Artem Rudenko3, Ilme Schlichting3,5, Lothar Strüder4, Bill White2, Joachim Ullrich6, Ryan Coffee2, and Christoph Bostedt2 — 1TU Berlin — 2LCLS, Stanford — 3ASG — 4MPI HLL — 5MPI MF — 6MPI K
The interaction of strong, short laser pulses with large atomic clusters has become a vivid research field. The key point is the strongly increased energy absorption compared to single atoms, which has been shown for intense IR and up to VUV laser radiation. These results trigger an ongoing debate about the fs-fast absorption and recombination mechanisms, which happen during the cluster burst.
Our experiment gives a new insight by imaging the explosion dynamics at ~100 fs to 3 ps after the laser pulse in single shot modus. It was performed at the Linac Coherent Light Source (LCLS), which is recently the brightest available X-ray source with fs-pulse durations. Nm sized clusters were probed by the intense focused FEL beam after being irradiated with a strong, fs Ti:Sa pulse (800 nm). The cluster-pulse interaction was observed using simultaneously pnCCD detectors (scattering and fluorescence analysis) and ion /electron spectrometers (ionization processes insight). First results will be presented from both observation methods. This experiment was realized in the CFEL-ASG Multi-Purpose (CAMP) End Station.