Dresden 2017 – wissenschaftliches Programm

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MI: Fachverband Mikrosonden

MI 7: Poster: Microanalysis and Microscopy

MI 7.5: Poster

Mittwoch, 22. März 2017, 18:00–20:00, P4

Pre-Studies towards phase-contrast imaging in the field of laboratory astroparticle physics — •Max Schuster, Veronika Ludwig, Jens Rieger, Maria Seifert, Andreas Wolf, Georg Pelzer, Thilo Michel, Gisela Anton, and Stefan Funk — ECAP - Erlangen Centre for Astroparticle Physics, Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen

Laboratory astrophysics is an emerging field in astroparticle physics with the aim to prepare, control and investigate systems which behave similar to those of astrophysical origin.

Shock acceleration, e.g., is a candidate mechanism for the origin of cosmic rays. Therefore, the production of laser-induced shock fronts and the imaging of the resulting density distribution is of great interest.

X-ray phase-contrast Imaging (PCI) is an x-ray imaging method which is sensitive to local variations in the electron density distribution.

PCI of the shock front region with high intensity x-ray beams such as beams from free electron lasers can be used to acquire images of the projected electron density gradients in the shock.

High spatial resolution measurements of shock waves at an X-ray free electron laser have already been performed using propagation-based PCI. Compared to this, grating-based PCI promises better sensitivity to small variations in the densities.

In this contribution we will present a comparison between propagation and grating-based PCI with regard to their requirements on the experimental setup and on the image reconstruction.