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P: Fachverband Plasmaphysik
P 12: Astrophysical Plasmas & Laser Plasmas II
P 12.4: Talk
Thursday, September 2, 2021, 12:00–12:15, H5
Noise reduction for single-shot grating-based phase-contrast imaging at an x-ray backlighter — •Stephan Schreiner1, Bernhard Akstaller1, Lisa Dietrich1, Paul Neumayer2, Max Schuster1, Andreas Wolf1, Veronika Ludwig1, Thilo Michel1, Gisela Anton1, and Stefan Funk1 — 1Friedrich-Alexander Universität Erlangen-Nürnberg, Erwin-Rommel-Straße 1, 91058 Erlangen, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
X-ray backlighters allow to capture sharp images of fast dynamic processes , like laser-produced plasma shock-waves in high-energy density experiments, due to extremely short exposure times. Moiré imaging using a two-grating imaging setup enables to measure the absorption and differential phase-contrast (DPC) of these processes simultaneously, allowing to retrieve the electron-density distributions of the imaged object. However, acquiring images with one single-shot limits the x-ray photon flux, which can result in noisy images. In this contribution an implementation of a laser-driven x-ray backlighter experiment is presented and two noise reduction methods for single-shot images are evaluated.