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P: Fachverband Plasmaphysik

P 12: Astrophysical Plasmas & Laser Plasmas II

P 12.2: Talk

Thursday, September 2, 2021, 11:30–11:45, H5

Detector characterisation for grating-based X-ray phase-contrast imaging — •Constantin Rauch, Bernhard Akstaller, Lisa Dietrich, Dennis Haag, Veronika Ludwig, Stephan Schreiner, Max Schuster, Andreas Wolf, Thilo Michel, Gisela Anton, and Stefan Funk — Ecap - Erlangen Centre for Astroparticle Physics, University Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen

Imaging at X-ray backlighter allow to capture fast dynamic processes due to extremely short exposure times. Grating-based X-ray phase-contrast imaging is expected to observe plasma shocks with higher contrast than absorption-based imaging due to its sensitivity to the differential phase-shift caused by local electron density variation present in plasma shocks. These rapid processes place special demands on the imaging system consisting of two gratings and a detector. Optimising the setup promises improvements in photon noise and sensitivity. This can be achieved by optimising the gratings, their positions and the detector. In this contribution, a methodology for characterising X-ray detectors according to their resolution, sensitivity and noise in phase-contrast imaging is introduced.