Studying the Richtmyer–Meshkov instability in convergent geometry under high energy density conditions using the Decel platform
Abstract
The “Decel” platform at Sandia National Laboratories investigates the Richtmyer–Meshkov instability (RMI) in converging geometry under high energy density conditions [Knapp et al., Phys. Plasmas 27, 092707 (2020)]. In Decel, the Z machine magnetically implodes a cylindrical beryllium liner filled with liquid deuterium, launching a converging shock toward an on-axis beryllium rod machined with sinusoidal perturbations. The passage of the shock deposits vorticity along the Be/D2 interface, causing the perturbations to grow. Here, we present platform improvements along with recent experimental results. To improve the stability of the imploding liner to the magneto Rayleigh–Taylor instability, we modified its acceleration history by shortening the Z electrical current pulse. Next, we introduce a “split rod” configuration that allows two axial modes to be fielded simultaneously in different axial locations along the rod, doubling our data per experiment. We then demonstrate that asymmetric slots in the return current structure modify the magnetic drive pressure on the surface of the liner, advancing the evolution on one side of the rod by multiple ns compared to its 180° counterpart. This effectively enables two snapshots of the instability at different stages of evolution per radiograph with small deviations of the cross-sectional profile of the rod frommore »
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- OSTI Identifier:
- 1881819
- Alternate Identifier(s):
- OSTI ID: 1870043; OSTI ID: 1877159
- Report Number(s):
- LA-UR-21-32355; SAND2022-9251J
Journal ID: ISSN 1070-664X; TRN: US2307868
- Grant/Contract Number:
- 89233218CNA000001; NA0003525
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 29; Journal Issue: 5; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma physics; high energy density physics; hydrodynamics
Citation Formats
Yager-Elorriaga, David A., Doss, Forrest W., Shipley, Gabriel A., Knapp, Patrick F., Ruiz, Daniel E., Porwitzky, Andrew J., Fein, Jeffrey R., Merritt, Elizabeth Catherine, Martin, Matthew R., Myers, Clayton E., Jennings, Christopher A., Smith, I. C., Marshall, Dustin J., Aragon, C. R., Shulenburger, Luke, Mattsson, T. R., and Sinars, Daniel B. Studying the Richtmyer–Meshkov instability in convergent geometry under high energy density conditions using the Decel platform. United States: N. p., 2022.
Web. doi:10.1063/5.0087215.
Yager-Elorriaga, David A., Doss, Forrest W., Shipley, Gabriel A., Knapp, Patrick F., Ruiz, Daniel E., Porwitzky, Andrew J., Fein, Jeffrey R., Merritt, Elizabeth Catherine, Martin, Matthew R., Myers, Clayton E., Jennings, Christopher A., Smith, I. C., Marshall, Dustin J., Aragon, C. R., Shulenburger, Luke, Mattsson, T. R., & Sinars, Daniel B. Studying the Richtmyer–Meshkov instability in convergent geometry under high energy density conditions using the Decel platform. United States. https://doi.org/10.1063/5.0087215
Yager-Elorriaga, David A., Doss, Forrest W., Shipley, Gabriel A., Knapp, Patrick F., Ruiz, Daniel E., Porwitzky, Andrew J., Fein, Jeffrey R., Merritt, Elizabeth Catherine, Martin, Matthew R., Myers, Clayton E., Jennings, Christopher A., Smith, I. C., Marshall, Dustin J., Aragon, C. R., Shulenburger, Luke, Mattsson, T. R., and Sinars, Daniel B. Thu .
"Studying the Richtmyer–Meshkov instability in convergent geometry under high energy density conditions using the Decel platform". United States. https://doi.org/10.1063/5.0087215. https://www.osti.gov/servlets/purl/1881819.
@article{osti_1881819,
title = {Studying the Richtmyer–Meshkov instability in convergent geometry under high energy density conditions using the Decel platform},
author = {Yager-Elorriaga, David A. and Doss, Forrest W. and Shipley, Gabriel A. and Knapp, Patrick F. and Ruiz, Daniel E. and Porwitzky, Andrew J. and Fein, Jeffrey R. and Merritt, Elizabeth Catherine and Martin, Matthew R. and Myers, Clayton E. and Jennings, Christopher A. and Smith, I. C. and Marshall, Dustin J. and Aragon, C. R. and Shulenburger, Luke and Mattsson, T. R. and Sinars, Daniel B.},
abstractNote = {The “Decel” platform at Sandia National Laboratories investigates the Richtmyer–Meshkov instability (RMI) in converging geometry under high energy density conditions [Knapp et al., Phys. Plasmas 27, 092707 (2020)]. In Decel, the Z machine magnetically implodes a cylindrical beryllium liner filled with liquid deuterium, launching a converging shock toward an on-axis beryllium rod machined with sinusoidal perturbations. The passage of the shock deposits vorticity along the Be/D2 interface, causing the perturbations to grow. Here, we present platform improvements along with recent experimental results. To improve the stability of the imploding liner to the magneto Rayleigh–Taylor instability, we modified its acceleration history by shortening the Z electrical current pulse. Next, we introduce a “split rod” configuration that allows two axial modes to be fielded simultaneously in different axial locations along the rod, doubling our data per experiment. We then demonstrate that asymmetric slots in the return current structure modify the magnetic drive pressure on the surface of the liner, advancing the evolution on one side of the rod by multiple ns compared to its 180° counterpart. This effectively enables two snapshots of the instability at different stages of evolution per radiograph with small deviations of the cross-sectional profile of the rod from the circular. Using this platform, we acquired RMI data at 272 and 157 μm wavelengths during the single shock stage. Finally, we demonstrate the utility of these data for benchmarking simulations by comparing calculations using ALEGRA MHD and RageRunner.},
doi = {10.1063/5.0087215},
journal = {Physics of Plasmas},
number = 5,
volume = 29,
place = {United States},
year = {Thu May 26 00:00:00 EDT 2022},
month = {Thu May 26 00:00:00 EDT 2022}
}
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