Hydrodynamic instability experiments with three-dimensional modulations at the National Ignition Facility
Abstract
The first hydrodynamic instability growth measurements with three-dimensional (3D) surface-roughness modulations were performed on CH shell spherical implosions at the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Opt. Eng. 43, 2841 (2004)]. The initial capsule outer-surface amplitudes were increased approximately four times, compared with the standard specifications, to increase the signal-to-noise ratio, helping to qualify a technique for measuring small 3D modulations. The instability growth measurements were performed using x-ray through-foil radiography based on time-resolved pinhole imaging. Averaging over 15 similar images significantly increased the signal-to-noise ratio, making possible a comparison with 3D simulations. At a convergence ratio of ~2.4, the measured modulation levels were ~3 times larger than those simulated based on the growth of the known imposed initial surface modulations. Several hypotheses are discussed, including increased instability growth due to modulations of the oxygen content in the bulk of the capsule. In conclusion, future experiments will be focused on measurements with standard 3D ‘native-roughness’ capsules as well as with deliberately imposed oxygen modulations.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1234594
- Report Number(s):
- LLNL-JRNL-667997
Journal ID: ISSN 2095-4719; applab
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- High Power Laser Science and Engineering
- Additional Journal Information:
- Journal Volume: 3; Journal ID: ISSN 2095-4719
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION; hydrodynamic instabilities
Citation Formats
Smalyuk, V. A., Weber, S. V., Casey, D. T., Clark, D. S., Field, J. E., Haan, S. W., Hamza, A. V., Hoover, D. E., Landen, O. L., Nikroo, A., Robey, H. F., and Weber, C. R. Hydrodynamic instability experiments with three-dimensional modulations at the National Ignition Facility. United States: N. p., 2015.
Web. doi:10.1017/hpl.2015.12.
Smalyuk, V. A., Weber, S. V., Casey, D. T., Clark, D. S., Field, J. E., Haan, S. W., Hamza, A. V., Hoover, D. E., Landen, O. L., Nikroo, A., Robey, H. F., & Weber, C. R. Hydrodynamic instability experiments with three-dimensional modulations at the National Ignition Facility. United States. https://doi.org/10.1017/hpl.2015.12
Smalyuk, V. A., Weber, S. V., Casey, D. T., Clark, D. S., Field, J. E., Haan, S. W., Hamza, A. V., Hoover, D. E., Landen, O. L., Nikroo, A., Robey, H. F., and Weber, C. R. Thu .
"Hydrodynamic instability experiments with three-dimensional modulations at the National Ignition Facility". United States. https://doi.org/10.1017/hpl.2015.12. https://www.osti.gov/servlets/purl/1234594.
@article{osti_1234594,
title = {Hydrodynamic instability experiments with three-dimensional modulations at the National Ignition Facility},
author = {Smalyuk, V. A. and Weber, S. V. and Casey, D. T. and Clark, D. S. and Field, J. E. and Haan, S. W. and Hamza, A. V. and Hoover, D. E. and Landen, O. L. and Nikroo, A. and Robey, H. F. and Weber, C. R.},
abstractNote = {The first hydrodynamic instability growth measurements with three-dimensional (3D) surface-roughness modulations were performed on CH shell spherical implosions at the National Ignition Facility (NIF) [G. H. Miller, E. I. Moses, and C. R. Wuest, Opt. Eng. 43, 2841 (2004)]. The initial capsule outer-surface amplitudes were increased approximately four times, compared with the standard specifications, to increase the signal-to-noise ratio, helping to qualify a technique for measuring small 3D modulations. The instability growth measurements were performed using x-ray through-foil radiography based on time-resolved pinhole imaging. Averaging over 15 similar images significantly increased the signal-to-noise ratio, making possible a comparison with 3D simulations. At a convergence ratio of ~2.4, the measured modulation levels were ~3 times larger than those simulated based on the growth of the known imposed initial surface modulations. Several hypotheses are discussed, including increased instability growth due to modulations of the oxygen content in the bulk of the capsule. In conclusion, future experiments will be focused on measurements with standard 3D ‘native-roughness’ capsules as well as with deliberately imposed oxygen modulations.},
doi = {10.1017/hpl.2015.12},
journal = {High Power Laser Science and Engineering},
number = ,
volume = 3,
place = {United States},
year = {Thu Jun 18 00:00:00 EDT 2015},
month = {Thu Jun 18 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Hydrodynamic instability growth of three-dimensional, “native-roughness” modulations in x-ray driven, spherical implosions at the National Ignition Facility
journal, July 2015
- Smalyuk, V. A.; Weber, S. V.; Casey, D. T.
- Physics of Plasmas, Vol. 22, Issue 7
Experimental results of radiation-driven, layered deuterium-tritium implosions with adiabat-shaped drives at the National Ignition Facility
journal, October 2016
- Smalyuk, V. A.; Robey, H. F.; Döppner, T.
- Physics of Plasmas, Vol. 23, Issue 10
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
- Smalyuk, V. A.; Weber, C. R.; Robey, H. F.
- Physics of Plasmas, Vol. 24, Issue 4
Hydro-instability growth of perturbation seeds from alternate capsule-support strategies in indirect-drive implosions on National Ignition Facility
journal, October 2017
- Martinez, D. A.; Smalyuk, V. A.; MacPhee, A. G.
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Mitigation of X-ray shadow seeding of hydrodynamic instabilities on inertial confinement fusion capsules using a reduced diameter fuel fill-tube
journal, May 2018
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- Physics of Plasmas, Vol. 25, Issue 5
Visualizing deceleration-phase instabilities in inertial confinement fusion implosions using an “enhanced self-emission” technique at the National Ignition Facility
journal, May 2018
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Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes
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- MacPhee, A. G.; Smalyuk, V. A.; Landen, O. L.
- Physics of Plasmas, Vol. 25, Issue 8
Theoretical investigations on melting/crystallization kinetics in overheated/overcooled aluminum at high pressures
journal, September 2019
- Xiang, Meizhen; Jiang, Songqing; Chen, Jun
- Journal of Applied Physics, Vol. 126, Issue 12