EPS 2018 Programme

P1.2004 Quantitative X-ray Phase Contrast Imaging of a laser driven shock wave

Jul 2, 2018, 2:00 PM

2h

Mánes

Poster POSTER SESSION

Speaker

Francesco Barbato

Description

See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P1.2004.pdf Quantitative X­ray Phase Contrast Imaging of a laser driven shock wave F.Barbato1, S. Atzeni2, D. Batani3, D. Bleiner1, G. Boutoux3, C. Brabetz4, P. Bradford7, D. Mancelli3,5, P. Neumayer4, J. Trela3, L. Volpe6,8, G. Zeraouli6, N. Woolsey7, and L.Antonelli7 1 Empa Materials Science and Technology, Dübendorf, Switzerland 2 Dipartimento SBAI, Università di Roma “La Sapienza”, Rome, Italy 3 Universitè de Bordeaux, CNRS, CEA, CELIA, Talence, France 4 GSI, Darmstadt, Germany 5 University of the Basque Country, Donostia International Physics Center, Spain 6 Centro de Laseres Pulsados (CLPU), Salamanca, Spain 8 University of Salamanca, Salamanca, Spain 7 York Plasma Institute University of York, York, United Kigngdom X­ray Phase Contrast Imaging (XPCI) [1] is a technique based on the photon phase­shift caused by an intense density gradient. It is therefore particularly indicated to probe materials which present density interphases such as a biological sample. However, this technique could also present several advantages compared to standard absorption radiography in the study of high energy density (HED) physics and warm dense matter (WDM). In particular, laser­induced shock­waves present high density gradients (in particular on the shock front) and they can propagate in materials at very different densities (e.g. multi­layer targets). To prove this, we performed an experiment at GSI using the laser PHELiX. In particular we used a ns laser pulse to lunch a shock­wave in a plastic cylinder and a sub ps laser pulse to generate a short X­ray back­lighter. The X­ray source was limited in space by the dimension of the target (5 μm diameter tungsten wire) to guarantee lateral coherence. From each experimental image, the amplitude and the phase map were extracted allowing a direct comparison with a hydrodynamic simulation, demonstrating the validity of such approach in HED and WDM physics. This work benefited from the support of COST Action MP1208, the Eurofusion Project AWP17­ENR­IFECEA­01 and by LASERLAB­EUROPE (grant agreement no. 654148) 1. S. W. Wilkins et al. , Nature 384, 335–338 (1996). 2. Paganin, David, et al., Journal of microscopy 206.1 (2002): 33­40.h