High spatial resolution and contrast radiography of hydrodynamic instabilities at the National Ignition Facility
(2022) In Physics of Plasmas 29(8).- Abstract
We are developing techniques for studying the Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) instabilities in a planar geometry at high-energy-densities at the National Ignition Facility (NIF). In particular, through the improvement of experimental imaging quality, we are progressing toward the study of the turbulent regime of the mixing regions in capsule implosion experiments for inertial confinement fusion, which requires few micrometers resolution. Using 60 NIF beams, a solid shock tube is driven launching a shock wave that crosses the interface between a dense and a light material pre-machined in the target to obtain sinusoidal ripples, which results in RM and RT instabilities that are imaged using the NIF Crystal Backlighter... (More)
We are developing techniques for studying the Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) instabilities in a planar geometry at high-energy-densities at the National Ignition Facility (NIF). In particular, through the improvement of experimental imaging quality, we are progressing toward the study of the turbulent regime of the mixing regions in capsule implosion experiments for inertial confinement fusion, which requires few micrometers resolution. Using 60 NIF beams, a solid shock tube is driven launching a shock wave that crosses the interface between a dense and a light material pre-machined in the target to obtain sinusoidal ripples, which results in RM and RT instabilities that are imaged using the NIF Crystal Backlighter Imager. High-quality images were obtained with a mean resolution of 7 μm and improved contrast. While the obtained resolution does not allow the observation of the smallest scale of the "turbulent"energy spectrum, the generated image encompasses 63% of the total flow energy, a 50% improvement over previous studies, which is observed for the first time a roll-up feature in a high energy density-type RT experiment.
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- author
- Do, A. ; Angulo, A. M. ; Nagel, S. R. ; Hall, G. N. ; Bradley, D. K. ; Hsing, W. W. ; Pickworth, L. A. LU ; Izumi, N. ; Robey, H. F. and Zhou, Y.
- organization
- publishing date
- 2022-08
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics of Plasmas
- volume
- 29
- issue
- 8
- article number
- 080703
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- scopus:85137084348
- ISSN
- 1070-664X
- DOI
- 10.1063/5.0087214
- language
- English
- LU publication?
- yes
- id
- c29f8cb9-f556-43e4-9339-01bd599a61d5
- date added to LUP
- 2022-11-09 12:02:08
- date last changed
- 2022-11-09 12:02:08
@article{c29f8cb9-f556-43e4-9339-01bd599a61d5,
abstract = {{<p>We are developing techniques for studying the Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) instabilities in a planar geometry at high-energy-densities at the National Ignition Facility (NIF). In particular, through the improvement of experimental imaging quality, we are progressing toward the study of the turbulent regime of the mixing regions in capsule implosion experiments for inertial confinement fusion, which requires few micrometers resolution. Using 60 NIF beams, a solid shock tube is driven launching a shock wave that crosses the interface between a dense and a light material pre-machined in the target to obtain sinusoidal ripples, which results in RM and RT instabilities that are imaged using the NIF Crystal Backlighter Imager. High-quality images were obtained with a mean resolution of 7 μm and improved contrast. While the obtained resolution does not allow the observation of the smallest scale of the "turbulent"energy spectrum, the generated image encompasses 63% of the total flow energy, a 50% improvement over previous studies, which is observed for the first time a roll-up feature in a high energy density-type RT experiment.</p>}},
author = {{Do, A. and Angulo, A. M. and Nagel, S. R. and Hall, G. N. and Bradley, D. K. and Hsing, W. W. and Pickworth, L. A. and Izumi, N. and Robey, H. F. and Zhou, Y.}},
issn = {{1070-664X}},
language = {{eng}},
number = {{8}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Physics of Plasmas}},
title = {{High spatial resolution and contrast radiography of hydrodynamic instabilities at the National Ignition Facility}},
url = {{http://dx.doi.org/10.1063/5.0087214}},
doi = {{10.1063/5.0087214}},
volume = {{29}},
year = {{2022}},
}