First Measurements of Fuel-Ablator Interface Instability Growth in Inertial Confinement Fusion Implosions on the National Ignition Facility

Weber, Christopher; Döppner, T.; Casey, D. T.; Bunn, Thomas L.; Carlson, L.; Dylla‐Spears, Rebecca; Kozioziemski, B J; MacPhee, A. G.; Nikroo, A.; Robey, H. F.; Sater, J. D.; Smalyuk, V. A.

doi:10.1103/physrevlett.117.075002

Cited by 36 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A wide variety of experiments are being performed on the NIF to study the hydrodynamics of ICF capsule implosions (17, 35–45). At the ablation front, instability growth of preimposed modulations was measured with in-flight, time-resolved, face-on, X-ray radiography (35, 36, 39, 46, 47).…”

Section: Ablation Front Spherical Hydrodynamic Instability Experimentsmentioning

confidence: 99%

“…At the ablation front, instability growth of preimposed modulations was measured with in-flight, time-resolved, face-on, X-ray radiography (35, 36, 39, 46, 47). Perturbation growth of “native roughness” modulations and engineering features such as fill tubes and capsule support membranes was also measured (37, 42, 48), as was instability growth at the ablator–ice interface (41). In the deceleration phase of implosions, RT growth from low-mode asymmetries and high-mode perturbations was measured near peak compression with X-ray and nuclear techniques.…”

Section: Ablation Front Spherical Hydrodynamic Instability Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

Remington

Park

Casey

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

The Rayleigh-Taylor (RT) instability occurs at an interface between two fluids of differing density during an acceleration. These instabilities can occur in very diverse settings, from inertial confinement fusion (ICF) implosions over spatial scales of [Formula: see text] cm (10-1,000 μm) to supernova explosions at spatial scales of [Formula: see text] cm and larger. We describe experiments and techniques for reducing ("stabilizing") RT growth in high-energy density (HED) settings on the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. Three unique regimes of stabilization are described: () at an ablation front, () behind a radiative shock, and () due to material strength. For comparison, we also show results from nonstabilized "classical" RT instability evolution in HED regimes on the NIF. Examples from experiments on the NIF in each regime are given. These phenomena also occur in several astrophysical scenarios and planetary science [Drake R (2005) 47:B419-B440; Dahl TW, Stevenson DJ (2010) 295:177-186].

show abstract

Section: Ablation Front Spherical Hydrodynamic Instability Experimentsmentioning

confidence: 99%

Section: Ablation Front Spherical Hydrodynamic Instability Experimentsmentioning

confidence: 99%

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

Remington

Park

Casey

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…Unexpected sources of perturbations such as capsule tents were discovered with the development of dedicated platforms [64][65][66]. Perturbations induced by 3D capsule surface roughness [67], as well as inner DT ice modulations, were quantified [68]. Hydrodynamics instabilities can be increased by feed-through processes at various interfaces [69].…”

Section: (B) Indirect-drive Physicsmentioning

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.

View full text Add to dashboard Cite

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)’.

show abstract

“…The interface between the ablator and DT ice can potentially become unstable due to classical Rayleigh-Taylor instability [1] leading to the reduced compression, ablator-fuel mix, and as a result, to reduced neutron performance [1]. To address this physics, the HGR platform was extended to include DT layers to perform instability measurements at ablator-ice interface in the acceleration phase of implosions [20].…”

Section: Instability Growth At Ablator-ice Interface With 2-d Perturb...mentioning

confidence: 99%

“…The measured growth of these perturbations was explained using models including ablator-ice mixing, as described in ref. [20]. Future experiments will concentrate on direct measurements of the ablator-ice mixing with "native" roughness perturbations at this interface.…”

Section: Instability Growth At Ablator-ice Interface With 2-d Perturb...mentioning

confidence: 99%

Mix and hydrodynamic instabilities on NIF

et al. 2017

View full text Add to dashboard Cite

A: Several new platforms have been developed to experimentally measure hydrodynamic instabilities in all phases of indirect-drive, inertial confinement fusion implosions on National Ignition Facility. At the ablation front, instability growth of pre-imposed modulations was measured with a face-on, x-ray radiography platform in the linear regime using the Hydrodynamic Growth Radiography (HGR) platform. Modulation growth of "native roughness" modulations and engineering features (fill tubes and capsule support membranes) were measured in conditions relevant to layered DT implosions. A new experimental platform was developed to measure instability growth at the ablator-ice interface. In the deceleration phase of implosions, several experimental platforms 1Corresponding author.

show abstract

First Measurements of Fuel-Ablator Interface Instability Growth in Inertial Confinement Fusion Implosions on the National Ignition Facility

Cited by 36 publications

References 39 publications

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

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

Mix and hydrodynamic instabilities on NIF

Contact Info

Product

Resources

About