Development of Indirectly Driven Shock Tube Targets for Counter-Propagating Shear-Driven Kelvin-Helmholtz Experiments on the National Ignition Facility

Capelli, Deanna; Schmidt, D. W.; Cárdenas, T.; Rivera, Gerald; Randolph, R. B.; Fierro, F.; Merritt, Elizabeth; Flippo, K. A.; Doss, F. W.; Kline, J. L.

doi:10.13182/fst15-229

Cited by 13 publications

(9 citation statements)

References 7 publications

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“…This platform uses a physics package located inside of a ∼ 1.5 mm long, 0.5 mm inner diameter Be cylindrical shock tube. [14] The physics package ( Fig. 1a) consists of two hemi-cylindrical low-density (60 mg/cm 3 ) CH foams around a thin solid metal plate which serves as a tracer layer.…”

Section: Experiments Platformmentioning

confidence: 99%

Demonstration of repeatability in a high-energy-density planar shear mixing layer experiment

Merritt

Doss

Stéfano

et al. 2017

High Energy Density Physics

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Section: Experiments Platformmentioning

confidence: 99%

Demonstration of repeatability in a high-energy-density planar shear mixing layer experiment

Merritt

Doss

Stéfano

et al. 2017

High Energy Density Physics

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“…The experimental system is constructed by first coining a rectangular Al foil, nominally 20 µm thick, such that a sinusoidal perturbation of nominal initial amplitude a o =2.74 ± 0.85 µm and of a given wavelength is impressed upon both sides [39]. These wavelengths range from 50 µm to 200 µm.…”

Section: Experimental System and Resultsmentioning

confidence: 99%

Evolution of surface structure in laser-preheated perturbed materials

et al. 2017

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We report an experimental and computational study investigating the effects of laser preheat on the hydrodynamic behavior of a material layer. In particular, we find that perturbation of the surface of the layer results in a complex interaction, in which the bulk of the layer develops density, pressure, and temperature structure, and in which the surface experiences instability-like behavior, including mode coupling. A uniform one-temperature preheat model is used to reproduce the experimentallyobserved behavior, and we find that this model can be used to capture the evolution of the layer, while also providing evidence of complexities in the preheat behavior. This result has important consequences for inertially-confined fusion plasmas, which can be difficult to diagnose in detail, as well as for laser hydrodynamics experiments, which generally depend on assumptions about initial conditions in order to interpret their results.

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“…In this work, we use the shock-shear platform [23,24] developed at Los Alamos National Laboratory (LANL) to quantify the dynamics of magnetic fields in HED plasmas with instabilities and turbulence. The shock compression can achieve a regime where the density is around 1g/cc.…”

Section: Introductionmentioning

confidence: 99%

“…The shock-shear platform [23,24], as a platform to isolatedly study the shear-induced instabilities and turbulence production under HED conditions, i.e. pressure larger than 1Mbar, has been used to investigate the turbulent mixing [26,27] at material interfaces when subject to multiple shocks and reshocks or high-speed shear [23,28].…”

Section: Introductionmentioning

confidence: 99%

Modeling hydrodynamics, magnetic fields, and synthetic radiographs for high-energy-density plasma flows in shock-shear targets

et al. 2020

Physics of Plasmas

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Three-dimensional FLASH radiation-magnetohydrodynamics (radiation-MHD) modeling is carried out to study the hydrodynamics and magnetic fields in the shock-shear derived platform. Simulations indicate that fields of tens of Tesla can be generated via Biermann battery effect due to vortices and mix in the counter-propagating shock-induced shear layer. Synthetic proton radiography simulations using MPRAD and synthetic X-ray image simulations using SPECT3D are carried out to predict the observable features in the diagnostics. Quantifying the effects of magnetic fields in inertial confinement fusion (ICF) and high-energy-density (HED) plasmas represents frontier research that has far-reaching implications in basic and applied sciences.

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Development of Indirectly Driven Shock Tube Targets for Counter-Propagating Shear-Driven Kelvin-Helmholtz Experiments on the National Ignition Facility

Cited by 13 publications

References 7 publications

Demonstration of repeatability in a high-energy-density planar shear mixing layer experiment

Demonstration of repeatability in a high-energy-density planar shear mixing layer experiment

Evolution of surface structure in laser-preheated perturbed materials

Modeling hydrodynamics, magnetic fields, and synthetic radiographs for high-energy-density plasma flows in shock-shear targets

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