Oxford Centre for High Energy Density Science (OxCHEDS)

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Resonant excitation of plasma waves in a plasma channel

(2023)

Authors:

Aimee J Ross, James Chappell, Johannes J van de Wetering, James Cowley, Emily Archer, Nicolas Bourgeois, Laura Corner, David R Emerson, Linus Feder, Xiao J Gu, Oscar Jakobsson, Harry Jones, Alexander Picksley, Linus Reid, Wei-Ting Wang, Roman Walczak, Simon M Hooker
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Dielectronic satellite emission from a solid-density Mg plasma: relationship to models of ionisation potential depression

(2023)

Authors:

G Pérez-Callejo, T Gawne, TR Preston, P Hollebon, OS Humphries, H-K Chung, GL Dakovski, J Krzywinski, MP Minitti, T Burian, J Chalupský, V Hájková, L Juha, V Vozda, U Zastrau, SM Vinko, SJ Rose, JS Wark
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Multi-Messenger Measurements of the Static Structure of Shock-Compressed Liquid Silicon at 100 GPa

(2023)

Authors:

H Poole, MK Ginnane, M Millot, GW Collins, SX Hu, D Polsin, R Saha, J Topp-Mugglestone, TG White, DA Chapman, JR Rygg, SP Regan, G Gregori
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Investigating mechanisms of state localization in highly ionized dense plasmas

Physical Review E American Physical Society 108:3 (2023) 35210

Authors:

Thomas Gawne, Thomas Campbell, Alessandro Forte, Patrick Hollebon, Gabriel Perez-Callejo, Oliver S Humphries, Oliver Karnbach, Muhammad F Kasim, Thomas R Preston, Hae Ja Lee, Alan Miscampbell, Quincy Y van den Berg, Bob Nagler, Shenyuan Ren, Ryan B Royle, Justin Wark, Sam M Vinko

Abstract:

We present experimental observations of Kβ emission from highly charged Mg ions at solid density, driven by intense x rays from a free electron laser. The presence of Kβ emission indicates the n = 3 atomic shell is relocalized for high charge states, providing an upper constraint on the depression of the ionization potential. We explore the process of state relocalization in dense plasmas from first principles using finite-temperature density functional theory alongside a wave-function localization metric, and find excellent agreement with experimental results.

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Quantifying ionization in hot dense plasmas

(2023)

Authors:

Thomas Gawne, Sam M Vinko, Justin S Wark
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