Mainz 2022 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 3: Laser Plasmas I
P 3.6: Vortrag
Montag, 28. März 2022, 15:15–15:30, P-H12
Isochoric Heating in Multilayer Targets upon Ultra High Intensity Laser Irradiation by Density Oscillation — •Franziska Paschke-Bruehl1,2, Lisa Randolph3, Mohammadreza Banjafar2,4, Motoaki Nakatsutsumi4, Lingen Huang1, Christian Gutt3, Ulrich Schramm1, Thomas E. Cowan1,2, and Thomas Kluge1 — 1Helmholtz-Zentrum Dresden - Rossendorf, Dresden, Germany — 2Technische Universität Dresden, Dresden, Germany — 3Universität Siegen, Siegen, Germany — 4European XFEL, Schenefeld, Germany
Reaching higher ion and electron temperatures in laser-solid plasma interaction can be done by either increasing laser intensity or changing target design. We will show how a multilayer target behaves under ultra high intensity laser irradiation, based on a PIC simulation study. There we observe density oscillation, a dynamic, that has not been mentioned in plasma physics yet. It describes how neighboring layers repeatedly compress each other, causing the ion and electron density of each layer to oscillate over time. During this process, the particles gain kinetic energy and temerpature, thus heat differently compared to a non layered target. Based on that, we will show how the density oscillation affects the isochoric heating of the target. In addition to that we present a method of confirming these computational results in an experiment by applying a GISAXS (grazing- incidence small-angle scattering) technique.