Bruce A. Remington New regimes of high energy density

Описание: Title: New regimes of high energy density (HED) science on the National Ignition Facility
Speaker: Bruce A. Remington, NIF Discovery Science Program Leader,
Institute: Lawrence Livermore National Laboratory, Livermore, CA, USA

The Discovery Science program at NIF allows basic science to be pursued on NIF. A number of examples will be given in this presentation. Equations of state at extreme pressures relevant to planetary and exoplanet interiors are being measured. [1] Studies of Rayleigh-Taylor instabilities at high Reynolds number, relevant to supernova explosions, are being studied. [2] Experiments to study magnetic reconnection at HED conditions have been done. [3] High velocity, low density interpenetrating plasmas that generate collisionless astrophysical shocks, magnetic fields, and that accelerate particles relevant to cosmic ray sources are also being studied. [4] Experiments relevant to turbulent star formation dynamics are underway on NIF. [5, 6] Relativistically hot plasmas are being generated and studied on the NIF ARC laser, with possible relevance to gamma burst dynamics. [7]

[1] T. Döppner et al., “Observing the onset of pressure-driven K-shell delocalization,” Nature 618, 270 (2023).
[2] S.R. Nagel et al., “A platform for studying the Rayleigh–Taylor and Richtmyer–Meshkov instabilities in a planar geometry at high energy density at the National Ignition Facility,” PoP 24, 072704 (2017).
[3] V.V. Valenzuela et al., “X-ray imaging and electron temperature evolution in laser driven magnetic reconnection experiments at the National Ignition Facility,” PoP 31, 082106 (2024).
[4] F. Fiuza et al., “Electron acceleration in laboratory-produced turbulent collisionless shocks,” Nature Physics Letters 16, 916 (2020).
[5] S. Davidovits et al., “Turbulence generation by shock interaction with a highly nonuniform
medium,” PRE 105, 065206 (2022).
[6] S. Dhawalikar et al., “The driving mode of shock-driven turbulence,” MNRAS 514, 1782 (2022).
[7] G.J. Williams et al., “Relativistically hot plasmas generated using the high intensity ARC laser at NIF,” PRE 103, L031201 (2021).

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