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

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [3];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, Rochester, NY (United States)
  3. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab., Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1281686
Alternate Identifier(s):
OSTI ID: 1261225
Report Number(s):
LLNL-JRNL-681089
Journal ID: ISSN 0031-9007
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 3; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION

Citation Formats

Pickworth, L. A., Hammel, B. A., Smalyuk, V. A., MacPhee, A. G., Scott, H. A., Robey, H. F., Landen, O. L., Barrios, M. A., Regan, S. P., Schneider, M. B., Hoppe, Jr., M., Kohut, T., Holunga, D., Walters, C., Haid, B., and Dayton, M. Measurement of hydrodynamic growth near peak velocity in an inertial confinement fusion capsule implosion using a self-radiography technique. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.117.035001.
Pickworth, L. A., Hammel, B. A., Smalyuk, V. A., MacPhee, A. G., Scott, H. A., Robey, H. F., Landen, O. L., Barrios, M. A., Regan, S. P., Schneider, M. B., Hoppe, Jr., M., Kohut, T., Holunga, D., Walters, C., Haid, B., & Dayton, M. Measurement of hydrodynamic growth near peak velocity in an inertial confinement fusion capsule implosion using a self-radiography technique. United States. https://doi.org/10.1103/PhysRevLett.117.035001
Pickworth, L. A., Hammel, B. A., Smalyuk, V. A., MacPhee, A. G., Scott, H. A., Robey, H. F., Landen, O. L., Barrios, M. A., Regan, S. P., Schneider, M. B., Hoppe, Jr., M., Kohut, T., Holunga, D., Walters, C., Haid, B., and Dayton, M. 2016. "Measurement of hydrodynamic growth near peak velocity in an inertial confinement fusion capsule implosion using a self-radiography technique". United States. https://doi.org/10.1103/PhysRevLett.117.035001. https://www.osti.gov/servlets/purl/1281686.
@article{osti_1281686,
title = {Measurement of hydrodynamic growth near peak velocity in an inertial confinement fusion capsule implosion using a self-radiography technique},
author = {Pickworth, L. A. and Hammel, B. A. and Smalyuk, V. A. and MacPhee, A. G. and Scott, H. A. and Robey, H. F. and Landen, O. L. and Barrios, M. A. and Regan, S. P. and Schneider, M. B. and Hoppe, Jr., M. and Kohut, T. and Holunga, D. and Walters, C. and Haid, B. and Dayton, M.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.117.035001},
url = {https://www.osti.gov/biblio/1281686}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 3,
volume = 117,
place = {United States},
year = {Mon Jul 11 00:00:00 EDT 2016},
month = {Mon Jul 11 00:00:00 EDT 2016}
}

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Cited by: 28 works
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Works referenced in this record:

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Works referencing / citing this record:

The National Ignition Facility modular Kirkpatrick-Baez microscope
journal, August 2016


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


Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes
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Modeling of direct-drive cylindrical implosion experiments with an Eulerian radiation-hydrodynamics code
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Using cylindrical implosions to investigate hydrodynamic instabilities in convergent geometry
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Three-dimensional modeling and hydrodynamic scaling of National Ignition Facility implosions
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Mixing in ICF implosions on the National Ignition Facility caused by the fill-tube
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Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility
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Review of hydrodynamic instability experiments in inertially confined fusion implosions on National Ignition Facility
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Diffusion-dominated mixing in moderate convergence implosions
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