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Title: Measurement of hydrodynamic growth near peak velocity in an inertial confinement fusion capsule implosion using a self-radiography technique

Journal Article · · Physical Review Letters

First measurements of hydrodynamic growth near peak implosion velocity in an inertial confinement fusion (ICF) implosion at the National Ignition Facility were obtained using a self-radiographing technique and a preimposed Legendre mode 40, λ = 140 μm, sinusoidal perturbation. These are the first measurements of the total growth at the most unstable mode from acceleration Rayleigh-Taylor achieved in any ICF experiment to date, showing growth of the areal density perturbation of ~7000×. Measurements were made at convergences of ~5 to ~10× at both the waist and pole of the capsule, demonstrating simultaneous measurements of the growth factors from both lines of sight. The areal density growth factors are an order of magnitude larger than prior experimental measurements and differed by ~2× between the waist and the pole, showing asymmetry in the measured growth factors. As a result, these new measurements significantly advance our ability to diagnose perturbations detrimental to ICF implosions, uniquely intersecting the change from an accelerating to decelerating shell, with multiple simultaneous angular views.

Research Organization:
Lawrence Livermore National Lab., Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1281686
Alternate ID(s):
OSTI ID: 1261225
Report Number(s):
LLNL-JRNL-681089
Journal Information:
Physical Review Letters, Vol. 117, Issue 3; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (16)

The National Ignition Facility modular Kirkpatrick-Baez microscope journal August 2016
Hydrodynamic instability growth of three-dimensional modulations in radiation-driven implosions with “low-foot” and “high-foot” drives at the National Ignition Facility journal April 2017
Hydro-instability growth of perturbation seeds from alternate capsule-support strategies in indirect-drive implosions on National Ignition Facility journal October 2017
Fluorescence and absorption spectroscopy for warm dense matter studies and ICF plasma diagnostics journal May 2018
Note: Tandem Kirkpatrick–Baez microscope with sixteen channels for high-resolution laser-plasma diagnostics journal March 2018
Visualizing deceleration-phase instabilities in inertial confinement fusion implosions using an “enhanced self-emission” technique at the National Ignition Facility journal May 2018
Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes journal August 2018
Development of new platforms for hydrodynamic instability and asymmetry measurements in deceleration phase of indirectly driven implosions on NIF journal August 2018
Review of hydro-instability experiments with alternate capsule supports in indirect-drive implosions on the National Ignition Facility journal July 2018
Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code journal April 2019
Using cylindrical implosions to investigate hydrodynamic instabilities in convergent geometry journal November 2019
Three-dimensional modeling and hydrodynamic scaling of National Ignition Facility implosions journal May 2019
Mixing in ICF implosions on the National Ignition Facility caused by the fill-tube journal March 2020
Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility journal June 2018
Review of hydrodynamic instability experiments in inertially confined fusion implosions on National Ignition Facility journal October 2019
Diffusion-dominated mixing in moderate convergence implosions journal June 2018