Reduced ablative Rayleigh–Taylor growth measurements in indirectly driven laminated foils

Hüser, G.; Casner, A.; Massé, L.; Liberatore, S.; Galmiche, D.; Jacquet, L.; Theobald, M.

doi:10.1063/1.3545987

Cited by 10 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the optimization of the beams' focusing as a function of foil displacement sustains a constant acceleration throughout the 20 ns drive [25]. For both platforms, this is almost 5× more displacement than previously achieved on OMEGA [41][42][43][44]. As a consequence, a bubble-competition, bubble-merger regime was observed for the first time in ID [40,45,46].…”

Section: Extended Acceleration Duration and Travelled Dis-mentioning

confidence: 61%

From ICF to laboratory astrophysics: ablative and classical Rayleigh–Taylor instability experiments in turbulent-like regimes

et al. 2018

Self Cite

View full text Add to dashboard Cite

Rayleigh–Taylor instability (RTI) occurs whenever fluids of different densities are accelerated against the density gradient, as is the case for the target ablator in ICF implosions. The advent of megajoule class lasers, like the National Ignition Facility (NIF) or Laser Mégajoule, offers novel opportunities to study turbulent mixing flows in high energy density plasmas for fundamental hydrodynamics or laboratory astrophysics experiments. Here, we review different RTI experiments, performed either at the ablation front or at a classical embedded interface. A two-dimensional bubble-merger, bubble-competition regime was evidenced for the first time at the ablation front in indirect-drive on the NIF thanks to an unprecedented long x-ray drive. Similarly, a novel large-area, planar platform enables the capabilities to perform long duration direct drive hydrodynamics experiments on NIF. Starting from imprinted seeds, a three-dimensional bubble-merger regime was also observed in direct-drive, as larger bubbles overtook and merged with smaller bubbles. In the astrophysical context, RTI also plays a role in supernova (SN) explosions, either of Type Ia or II. We report on experiments performed on the LULI2000 facility studying RTI in scaled laboratory conditions relevant for the physics of young SN remnants. Using a light CH foam as a deceleration medium, we measured, for the first time, the RTI mixing zone by PW transverse radiography.

show abstract

Section: Extended Acceleration Duration and Travelled Dis-mentioning

confidence: 61%

From ICF to laboratory astrophysics: ablative and classical Rayleigh–Taylor instability experiments in turbulent-like regimes

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Experimental configuration ID ablative RTI experiments were performed using an axisymmetric geometry already detailed elsewhere. 39,40 A schematic of the experimental configuration is shown in Fig. 1(a).…”

Section: Omega Experiments In Laser-driven Half-hohlraummentioning

confidence: 99%

Progress in indirect and direct-drive planar experiments on hydrodynamic instabilities at the ablation front

et al. 2014

Self Cite

View full text Add to dashboard Cite

Understanding and mitigating hydrodynamic instabilities and the fuel mix are the key elements for achieving ignition in Inertial Confinement Fusion. Cryogenic indirect-drive implosions on the National Ignition Facility have evidenced that the ablative Rayleigh-Taylor Instability (RTI) is a driver of the hot spot mix. This motivates the switch to a more flexible higher adiabat implosion design [O. A. Hurricane et al., Phys. Plasmas 21, 056313 (2014)]. The shell instability is also the main candidate for performance degradation in low-adiabat direct drive cryogenic implosions [Goncharov et al., Phys. Plasmas 21, 056315 (2014)]. This paper reviews recent results acquired in planar experiments performed on the OMEGA laser facility and devoted to the modeling and mitigation of hydrodynamic instabilities at the ablation front. In application to the indirect-drive scheme, we describe results obtained with a specific ablator composition such as the laminated ablator or a graded-dopant emulator. In application to the direct drive scheme, we discuss experiments devoted to the study of laser imprinted perturbations with special phase plates. The simulations of the Richtmyer-Meshkov phase reversal during the shock transit phase are challenging, and of crucial interest because this phase sets the seed of the RTI growth. Recent works were dedicated to increasing the accuracy of measurements of the phase inversion. We conclude by presenting a novel imprint mitigation mechanism based on the use of underdense foams. The foams induce laser smoothing by parametric instabilities thus reducing the laser imprint on the CH foil. V C 2014 AIP Publishing LLC. [http://dx.

show abstract

Design and Fabrication of a CH/RF/CH Tri-Layer Perturbation Target for Hydrodynamic Instability Experiments in ICF

Tang

Xie

et al. 2015

J Fusion Energ

View full text Add to dashboard Cite

Reduced ablative Rayleigh–Taylor growth measurements in indirectly driven laminated foils

Cited by 10 publications

References 29 publications

From ICF to laboratory astrophysics: ablative and classical Rayleigh–Taylor instability experiments in turbulent-like regimes

From ICF to laboratory astrophysics: ablative and classical Rayleigh–Taylor instability experiments in turbulent-like regimes

Progress in indirect and direct-drive planar experiments on hydrodynamic instabilities at the ablation front

Design and Fabrication of a CH/RF/CH Tri-Layer Perturbation Target for Hydrodynamic Instability Experiments in ICF

Contact Info

Product

Resources

About