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Presented By: Applied Physics

Applied Physics Seminar: "Is This Even a Plasma? Physics of Strongly Coupled Plasmas"

Scott Baalrud, Associate Professor of Nuclear Engineering and Radiological Sciences, College of Engineering, University of Michigan

Abstract: Plasma is often described as an ionized gas. However, a rapidly growing field of research is concerned with strongly coupled states of plasma that are more akin to ionized liquids, solids, or supercritical fluids. Strongly coupled plasmas are found in nature, including the interior of giant planets, the core of stars, and even in lightning bolts. A recent surge of interest has been driven by the advent of high-intensity lasers capable of ionizing, heating, and compressing materials to tens of thousands of degrees at near solid density or several times compressed. These dense plasmas are not well described by either the methods of condensed matter theory (which deals with lower temperatures) or plasma theory (which deals with lower densities). Unique properties of this warm dense state of matter arise due to the combined influence of strong correlations amongst ions and Fermi degeneracy of electrons. This talk will present a new approach to kinetic theory that has made it practical to describe the dynamical transport properties of dense strongly coupled plasmas. It will also show how we have used simulations enabled by state-of-the-art high-performance computing to validate this theory.

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February 3, 2021 (Wednesday) 12:00pm
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