Professor Justin Wark: Publications

Observations of the Rayleigh-Taylor instability in laser imploded microballoons

Applied Physics Letters 48 (1986) 15

Studies of x-ray switching and shuttering techniques

Review of Scientific Instruments 57 (1986) 8

Time-Resolved X-Ray Diagnostics for High Density Plasma Physics Studies

Chapter in Laser Interaction and Related Plasma Phenomena, Springer Nature (1986) 179-211

Authors:

MC Richardson, GG Gregory, RL Keck, SA Letzring, RS Marjoribanks, FJ Marshall, G Pien, JS Wark, B Yaakobi, PD Goldstone, A Hauer, GS Stradling, F Ameduri, BL Henke, PA Jaanimagi

Ab-initio simulations and measurements of the free-free opacity in Aluminum

Physical Review E: Statistical, Nonlinear, and Soft Matter Physics American Physical Society

Authors:

P Hollebon, O Ciricosta, MP Desjarlais, C Cacho, C Spindloe, E Springate, ICE Turcu, JS Wark, SM Vinko

Abstract:

The free-free opacity in dense systems is a property that both tests our fundamental understanding of correlated many-body systems, and is needed to understand the radiative properties of high energy-density plasmas. Despite its importance, predictive calculations of the free-free opacity remain challenging even in the condensed matter phase for simple metals. Here we show how the free-free opacity can be modelled at finite-temperatures via time-dependent density functional theory, and illustrate the importance of including local field corrections, core polarization and self-energy corrections. Our calculations for ground-state Al are shown to agree well with experimental opacity measurements performed on the Artemis laser facility across a wide range of x-ray to ultraviolet wavelengths. We extend our calculations across the melt to the warm-dense matter regime, and find good agreement with advanced plasma models based on inverse bremsstrahlung at temperatures above 10 eV.

Driving Iron plasmas to stellar core conditions using extreme x-ray radiation

Authors:

Hae Ja Lee, Sam Vinko, Oliver Humphries, Eric Galtier, Ryan Royle, Muhammad Kasim, Shenyuan Ren, Roberto Alonso-Mori, Phillip Heimann, Mengning Liang, Matt Seaberg, Sébastien Boutet, Andrew A Aquila, Shaughnessy Brown, Akel Hashim, Mikako Makita, Christian David, Gediminas Seniutinas, Hyun-Kyung Chung, Gilliss Dyer, Justin Wark, Bob Nagler

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