Phase imaging of irradiated foils at the OMEGA EP facility using phase-stepping X-ray Talbot–Lau deflectometry  

作　　者：G.Pérez-Callejo V.Bouffetier L.Ceurvorst T.Goudal S.R.Klein D.Svyatskiy M.Holec P.Perez-Martin K.Falk A.Casner T.E.Weber G.Kagan M.P.Valdivia 

机构地区：[1]Departamento de Física Teórica Atómica yÓptica,Universidad de Valladolid,Valladolid,Spain [2]Universitéde Bordeaux-CNRS-CEA,Centre Lasers Intenses et Applications(CELIA),UMR 5107,Talence,France [3]European XFEL GmbH,Schenefeld,Germany [4]Laboratory for Laser Energetics,Rochester,New York,USA [5]CEA-DAM,DIF,Arpajon,France [6]University of Michigan,Ann Arbor,Michigan,USA [7]Los Alamos National Laboratory,Los Alamos,New Mexico,USA [8]Lawrence Livermore National Laboratory,Livermore,California,USA [9]Helmholtz-Zentrum Dresden-Rossendorf,Dresden,Germany [10]Technische Universität Dresden,Dresden,Germany [11]Institute of Physics of the ASCR,Prague,Czech Republic [12]CEA-CESTA,CS 60001,Le Barp Cedex,France [13]Blackett Laboratory,Imperial College London,London,UK [14]Department of Astrophysics and Astronomy,The Johns Hopkins University,Baltimore,Maryland,USA [15]Center for Energy Research,University of California San Diego,San Diego,California,USA

出　　处：《High Power Laser Science and Engineering》2023年第4期45-54,共10页高功率激光科学与工程（英文版）

基　　金：supported by the National Nuclear Security Administration (DENA0003882);funding from the Conseil Règional Aquitaine (INTALAX);the Agence Nationale de la Recherche (ANR-10-IDEX-03-02, ANR-15CE30-0011);supported by Research Grant No. PID2019-108764RB-I00 from the Spanish Ministry of Science and Innovation

摘　　要：Diagnosing the evolution of laser-generated high energy density(HED)systems is fundamental to develop a correct understanding of the behavior of matter under extreme conditions.Talbot–Lau interferometry constitutes a promising tool,since it permits simultaneous single-shot X-ray radiography and phase-contrast imaging of dense plasmas.We present the results of an experiment at OMEGA EP that aims to probe the ablation front of a laser-irradiated foil using a Talbot–Lau X-ray interferometer.A polystyrene(CH)foil was irradiated by a laser of 133 J,1 ns and probed with 8 keV laser-produced backlighter radiation from Cu foils driven by a short-pulse laser(153 J,11 ps).The ablation front interferograms were processed in combination with a set of reference images obtained ex situ using phase-stepping.We managed to obtain attenuation and phase-shift images of a laser-irradiated foil for electron densities above 1022 cm−3.These results showcase the capabilities of Talbot–Lau X-ray diagnostic methods to diagnose HED laser-generated plasmas through high-resolution imaging.

关 键 词：DEFLECTOMETRY OMEGA EP phase-contrast imaging Talbot-Lau X-ray interferometry 

分 类 号：O434.19[机械工程—光学工程] TP391.41[理学—光学]