Post-processing of face-on radiographic images for quantitative analysis in ablative Rayleigh-Taylor instability experiments

Ceurvorst, Luke; Khan, S. F.; Mailliet, C.; Martinez, D.; Izumi, N.; Nicola, P. Di; Nicola, J. M. Di; Goudal, T.; Bouffetier, V.; Kalantar, D.; Igumenshchev, I. V.; Bel, E. Le; Remington, B. A.; Massé, L.; Smalyuk, V. A.; Casner, A.

doi:10.1016/j.hedp.2020.100851

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…A series of NIF Discovery Science proposals have addressed this point, first in indirect drive with 2D pre-imposed perturbations [151][152][153]. Direct-drive experiments [154,155] performed with 3D laser imprinted perturbations features allow values of the self-similar RTI parameter α B [156,157] for different initial conditions [158] to be inferred. These measurements were compared with a theory including ablation corrections [159].…”

Section: (B) Fundamental High-energy-density Hydrodynamicsmentioning

confidence: 99%

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

Casner

2020

Phil. Trans. R. Soc. A.

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Since the seminal paper of Nuckolls triggering the quest of inertial confinement fusion (ICF) with lasers, hydrodynamic instabilities have been recognized as one of the principal hurdles towards ignition. This remains true nowadays for both main approaches (indirect drive and direct drive), despite the advent of MJ scale lasers with tremendous technological capabilities. From a fundamental science perspective, these gigantic laser facilities enable also the possibility to create dense plasma flows evolving towards turbulence, being magnetized or not. We review the state of the art of nonlinear hydrodynamics and turbulent experiments, simulations and theory in ICF and high-energy-density plasmas and draw perspectives towards in-depth understanding and control of these fascinating phenomena. This article is part of a discussion meeting issue ‘Prospects for high gain inertial fusion energy (part 2)’.

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Section: (B) Fundamental High-energy-density Hydrodynamicsmentioning

confidence: 99%

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

Casner

2020

Phil. Trans. R. Soc. A.

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Development of an x-ray radiography platform to study laser-direct-drive energy coupling at the National Ignition Facility

Ceurvorst

Theobald

Rosenberg

et al. 2022

Review of Scientific Instruments

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A platform has been developed to study laser-direct-drive energy coupling at the National Ignition Facility (NIF) using a plastic sphere target irradiated in a polar-direct-drive geometry to launch a spherically converging shock wave. To diagnose this system evolution, eight NIF laser beams are directed onto a curved Cu foil to generate He α line emission at a photon energy of 8.4 keV. These x rays are collected by a 100-ps gated x-ray imager in the opposing port to produce temporally gated radiographs. The platform is capable of acquiring images during and after the laser drive launches the shock wave. A backlighter profile is fit to the radiographs, and the resulting transmission images are Abel inverted to infer radial density profiles of the shock front and to track its temporal evolution. The measurements provide experimental shock trajectories and radial density profiles that are compared to 2D radiation-hydrodynamic simulations using cross-beam energy transfer and nonlocal heat-transport models.

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Post-processing of face-on radiographic images for quantitative analysis in ablative Rayleigh-Taylor instability experiments

Cited by 2 publications

References 30 publications

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

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

Development of an x-ray radiography platform to study laser-direct-drive energy coupling at the National Ignition Facility

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