Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Interaction with VUV and X-ray light II
A 14.2: Vortrag
Dienstag, 13. März 2012, 10:45–11:00, V57.05
Coincident imaging and ion spectroscopy of single gas-phase clusters — •D Rupp1, M Adolph1, T Gorkhover1, L Flückiger1, M Krikunova1, Y Ovcharenko1, M Sauppe1, S Schorb1,2, D Wolter1, M Harmand3, S Toleikis3, R Treusch3, C Bostedt1,2, T Möller1, and Authors as in Ref. 11 — 1TU Berlin — 2LCLS @ SLAC — 3HASYLAB @ DESY
Gas-phase clusters are an ideal target to study the fundamental mechanisms of the interaction between matter and strong light pulses. Novel Free-Electron Lasers (FELs) as FLASH and LCLS deliver highly intense ultrashort pulses in the high energy range. They provide the possibility of imaging single nanosized structures, enabling a completely new type of experiment. From the scattering patterns of an individual gas-phase cluster hit by an FEL pulse, we can extract its shape, size, the actual power density and even information on transient charge states in the developing nanoplasma. The imaging measurement is further combined in coincidence with additional detectors for reaction products as ions, electrons and fluorescent light. We overcome conventional averaging of cluster size distribution and power density profiles by sorting the single shots with the information from the scattering patterns. An unprecedented contrast is gained, for example in the ion spectra of single clusters hit by different intensities. In most recent experiments the setup was extended with pump-probe techniques to explore the timescales of cluster disintegration processes from the femtosecond to pico- and nanosecond range.
Ref.1: L Strueder et al. Nuc. Instr. and Meth. 614(3):483-496.