Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 9: Atomic clusters I (with A)
MO 9.5: Vortrag
Montag, 18. März 2013, 17:45–18:00, B 302
Time resolved electron spectra from clusters in the light of FLASH — •M. Müller1, D. Rupp1, T. Oelze1, M. Sauppe1, L. Flückiger1, T. Gorkhover1, A. Przystawik2, M. Adolph1, U. Frühling2, M. Wieland2, B. Schütte3, A. Al-Shemmary2, N. Stojanovic2, S. Toleikis2, J.-P. Müller1, M. Krikunova1, T. Laarmann2, and T. Möller1 — 1TU Berlin, Hardenbergstr. 36, 10623 Berlin — 2HASYLAB (DESY), Notkestr. 85, 22607 Hamburg — 3Max-Born-Institut, Rudower Chaussee 17, 12489 Berlin
During the last ten years free-electron lasers (FEL) made highly intense and short pulses from the soft to the hard X-ray regime for the first time accessible. Facilities like FLASH opened a wide range of new research fields concerning the interaction of light with matter for example in physics, chemistry and biology.
We use rare gas clusters as a model system to study the complex interaction, which proceeds on different time scales. At first the cluster is ionized. Due to the loss of electrons and further ionization the Coulomb potential of the cluster gets deeper and the electrons are trapped in the cluster - a nanoplasma is built up. Finally the cluster is destroyed either by coulomb explosion or hydrodynamic expansion of the nanoplasma. By measuring electron and ion spectra, further insight into the ionization and recombination processes can be gained. The temporal evolution of the FEL induced plasma dynamics in clusters was further investigated by means of streaking the photoelectrons with a THz pulse, a very promising new tool at FLASH. We will give an overview of our setup and discuss first results.