Oxford Centre for High Energy Density Science (OxCHEDS)

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Sparse Reconstruction of Wavefronts using an Over-Complete Phase Dictionary

(2024)

Authors:

S Howard, N Weisse, J Schroeder, C Barbero, B Alonso, I Sola, P Norreys, A Döpp

Toward first principles-based simulations of dense hydrogen

Physics of Plasmas AIP Publishing 31:11 (2024) 110501

Authors:

Michael Bonitz, Jan Vorberger, Mandy Bethkenhagen, Maximilian P Böhme, David M Ceperley, Alexey Filinov, Thomas Gawne, Frank Graziani, Gianluca Gregori, Paul Hamann, Stephanie B Hansen, Markus Holzmann, SX Hu, Hanno Kählert, Valentin V Karasiev, Uwe Kleinschmidt, Linda Kordts, Christopher Makait, Burkhard Militzer, Zhandos A Moldabekov, Carlo Pierleoni, Martin Preising, Kushal Ramakrishna, Ronald Redmer, Sebastian Schwalbe, Pontus Svensson, Tobias Dornheim
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On the localisation of the high-intensity region of simultaneous space-time foci

(2024)

Authors:

Emily Archer, Bangshan Sun, Roman Walczak, Martin Booth, Simon Hooker
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Modelling of warm dense hydrogen via explicit real time electron dynamics: Electron transport properties

(2024)

Authors:

Pontus Svensson, Patrick Hollebon, Daniel Plummer, Sam M Vinko, Gianluca Gregori
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Electrothermal filamentation of igniting plasmas

Physical Review E: Statistical, Nonlinear, and Soft Matter Physics American Physical Society 110 (2024) 035205

Authors:

Peter Norreys, Heath Martin, robert Paddock, Marko Von Der Leyen, Vadim Eliseev, Rusko Ruskov, Robin Timmis, Jordan Lee, Abigail James

Abstract:

Dense, hot plasmas are susceptible to the electrothermal instability: a collisional process which permits temperature perturbations in electron currents to grow. It is shown here for the first time that linearising a system comprised of two opposing currents and a mobile ion-background as three distinct fluids yields unstable modes with rapid growth rates (∼ 1013 s −1 ) for wavenumbers below a threshold kth. An analytical threshold condition is derived, this being surpassed for typical hot-spot and shell parameters. Particle-in-cell simulations successfully benchmark the predicted growth rates and threshold behaviour. Electrothermal filamentation within the shell will impact the burn wave propagation into the cold fuel and resulting burn dynamics.
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