Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Poster: Interaction with strong or short laser pulses

A 15.16: Poster

Montag, 17. März 2014, 16:30–18:30, Spree-Palais

Reconstructing scattering patterns of single xenon clusters — •Alexander Schreider¹, Leonie Flückiger¹, Fengling Wang², Daniela Rupp¹, and Thomas Möller¹ — ¹TU Berlin — ²Universität Hamburg

Structure determination of small particles with conventional optical microscopy is significantly limited by diffraction. Coherent Diffraction Imaging (CDI) with short wavelengths brings a solution for imaging such samples by recording diffraction patterns and subsequently reconstructing the lost phase information by iterative algorithms.

We used algorithms based on the Hybrid-Input-Output (HIO) al- gorithm [1], the Error-Reduction (ER) algorithm [2] and the Shrink-Wrap method [3] to develope a programm for reconstructing measured diffraction patterns of xenon clusters ab initio. This programm was tested and optimized for the particular difficulties of the cluster scattering patterns due to restrictions introduced by the experimental setup. The challenges and possible solutions will be discussed.

[1] J.R. Fienup, Optics Letters 3, 27 (1978), [2] J.R. Fienup, Applied Optics 21, 2758 (1982), [3] S. Marchesini et al., Physical Review B 68, 140101 (2003)