Recent progress in quantifying hydrodynamics instabilities and turbulence in inertial confinement fusion and high-energy-density experiments

Casner, A.

doi:10.1098/rsta.2020.0021

Cited by 11 publications

(8 citation statements)

References 187 publications

(213 reference statements)

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“…At the same time, the European consortium has worked on the underpinning microphysics including: a more precise understanding and mitigating the growth of Rayleigh–Taylor instabilities [20]; the role of non-local heat flow in burning plasmas [19] laser-plasma instabilities [21,22]; atomic physics [23,24] among others.…”

Section: Progressmentioning

confidence: 99%

Preparations for a European R&D roadmap for an inertial fusion demo reactor

Norreys

Ceurvorst

Sadler

et al. 2020

Phil. Trans. R. Soc. A.

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A European consortium of 15 laboratories across nine nations have worked together under the EUROFusion Enabling Research grants for the past decade with three principle objectives. These are: (a) investigating obstacles to ignition on megaJoule-class laser facilities; (b) investigating novel alternative approaches to ignition, including basic studies for fast ignition (both electron and ion-driven), auxiliary heating, shock ignition, etc.; and (c) developing technologies that will be required in the future for a fusion reactor. A brief overview of these activities, presented here, along with new calculations relates the concept of auxiliary heating of inertial fusion targets, and provides possible future directions of research and development for the updated European Roadmap that is due at the end of 2020. This article is part of a discussion meeting issue ‘Prospects for high gain inertial fusion energy (part 2)’.

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Section: Progressmentioning

confidence: 99%

Preparations for a European R&D roadmap for an inertial fusion demo reactor

Norreys

Ceurvorst

Sadler

et al. 2020

Phil. Trans. R. Soc. A.

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“…Compressible turbulent mixing between two fluids of different properties is a hot topic in fundamental research and also plays an important role in natural and industrial fields such as supernova explosions (Abarzhi et al. 2019) and inertial confinement fusion (Casner 2021). As a typical representative of compressible turbulence, turbulence developing from Richtmyer–Meshkov (RM) instability (Richtmyer 1960; Meshkov 1969) that occurs as a shock wave impacts a corrugated interface, has become increasingly attractive in recent years.…”

Section: Introductionmentioning

confidence: 99%

Scaling law of structure function of Richtmyer–Meshkov turbulence

Zhou,

Ding,

Cheng

et al. 2023

J. Fluid Mech.

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The scaling law of the structure function of Richtmyer–Meshkov (RM) turbulence is investigated both numerically and theoretically. High-fidelity simulations with a minimum-dispersion, adaptive-dissipation scheme are first performed. Results show that the mixing width experiences an exponential growth and the turbulent kinetic energy has a visible $-3/2$ spectrum. The scalar field exhibits a greater degree of intermittency than the velocity field, and also the small-scale statistics suffer a larger influence of large scales. Visible differences in the scaling law of the structure function among the RM turbulence and other types of turbulence are observed, which reveal the unique characteristic of RM turbulence. A phenomenological theory, which gives the spatial and temporal scaling laws of the structure functions of velocity and scalar of RM turbulence, is developed for the first time by introducing an external agent. The spatial scaling exponents of structure functions from simulation deviate from the Kolmogorov exponents, but are quite close to the RM-modified anomalous exponents. This demonstrates the validity of the present phenomenological theory. The temporal scaling exponents of structure functions first meet the RM-modified anomalous exponents, and then approach the Kolmogorov–Obukhov–Corrsin non-intermittent ones.

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“…1a), as well as in the local non-homogeneous aspect of the interstellar medium, thus affecting the star formation process [13][14][15] and the propagation of cosmic rays 16,17 . Although multiple studies have already been performed, including HEDP 3,18 , our understanding of turbulence, even in the classical hydrodynamic case, remains incomplete 19 .…”

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confidence: 99%

Micron-scale phenomena observed in a turbulent laser-produced plasma

et al. 2021

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Turbulence is ubiquitous in the universe and in fluid dynamics. It influences a wide range of high energy density systems, from inertial confinement fusion to astrophysical-object evolution. Understanding this phenomenon is crucial, however, due to limitations in experimental and numerical methods in plasma systems, a complete description of the turbulent spectrum is still lacking. Here, we present the measurement of a turbulent spectrum down to micron scale in a laser-plasma experiment. We use an experimental platform, which couples a high power optical laser, an x-ray free-electron laser and a lithium fluoride crystal, to study the dynamics of a plasma flow with micrometric resolution (~1μm) over a large field of view (>1 mm2). After the evolution of a Rayleigh–Taylor unstable system, we obtain spectra, which are overall consistent with existing turbulent theory, but present unexpected features. This work paves the way towards a better understanding of numerous systems, as it allows the direct comparison of experimental results, theory and numerical simulations.

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Recent progress in quantifying hydrodynamics instabilities and turbulence in inertial confinement fusion and high-energy-density experiments

Cited by 11 publications

References 187 publications

Preparations for a European R&D roadmap for an inertial fusion demo reactor

Preparations for a European R&D roadmap for an inertial fusion demo reactor

Scaling law of structure function of Richtmyer–Meshkov turbulence

Micron-scale phenomena observed in a turbulent laser-produced plasma

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