Experimental study of energy transfer in double shell implosions
Abstract
Advances in target fabrication have made double shell capsule implosions a viable platform to study burning fusion plasmas. Central to the double shell capsule is a high-Z (e.g., Au) metal pusher that accesses the volume-burn regime by reducing radiative losses through radiation trapping and compressing a uniform fuel volume at reduced velocities. A double shell implosion relies on a series of energy transfer processes starting from x-ray absorption by the outer shell, followed by transfer of kinetic energy to an inner shell, and finally conversion of kinetic energy to fuel internal energy. We present simulation and experimental results on momentum transfer to different layers in a double shell. We also present the details of the development of the NIF cylindrical hohlraum double shell platform including an imaging shell design with a mid-Z inner shell necessary for imaging the inner shell shape and the trajectory with the current 2DConA platform capability. We examine 1D energy transfer between shell layers using trajectory measurements from a series of surrogate targets; the series builds to a complete double shell layer by layer, isolating the physics of each step of the energy transfer process. Here, the measured energy transfer to the foam cushion and themore »
- Authors:
-
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- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1532713
- Alternate Identifier(s):
- OSTI ID: 1511524; OSTI ID: 1880963
- Report Number(s):
- LA-UR-18-31785; LLNL-JRNL-835453
Journal ID: ISSN 1070-664X
- Grant/Contract Number:
- 89233218CNA000001; AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 5; Conference: 60.Annual Meeting of the APS Division of Plasma Physics, Portland, OR (United States), 5-9 Nov 2018; 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; Double Shells; Radiation trapping
Citation Formats
Merritt, Elizabeth Catherine, Sauppe, Joshua Paul, Loomis, Eric Nicholas, Cardenas, Tana, Montgomery, David S., Daughton, William Scott, Wilson, Douglas Carl, Kline, John L., Khan, Shahab F., Schoff, Mike, Hoppe, Martin, Fierro, Franklin, Randolph, Randall Blaine, Patterson, Brian M., Kuettner, Lindsey Ann, Sacks, Ryan Foster, Dodd, Evan S., Wan, Willow Chilim, Palaniyappan, Sasikumar, Batha, Steven H., Keiter, Paul Arthur, Rygg, J. Ryan, Smalyuk, Vladimir, Ping, Yuan, and Amendt, Peter. Experimental study of energy transfer in double shell implosions. United States: N. p., 2019.
Web. doi:10.1063/1.5086674.
Merritt, Elizabeth Catherine, Sauppe, Joshua Paul, Loomis, Eric Nicholas, Cardenas, Tana, Montgomery, David S., Daughton, William Scott, Wilson, Douglas Carl, Kline, John L., Khan, Shahab F., Schoff, Mike, Hoppe, Martin, Fierro, Franklin, Randolph, Randall Blaine, Patterson, Brian M., Kuettner, Lindsey Ann, Sacks, Ryan Foster, Dodd, Evan S., Wan, Willow Chilim, Palaniyappan, Sasikumar, Batha, Steven H., Keiter, Paul Arthur, Rygg, J. Ryan, Smalyuk, Vladimir, Ping, Yuan, & Amendt, Peter. Experimental study of energy transfer in double shell implosions. United States. https://doi.org/10.1063/1.5086674
Merritt, Elizabeth Catherine, Sauppe, Joshua Paul, Loomis, Eric Nicholas, Cardenas, Tana, Montgomery, David S., Daughton, William Scott, Wilson, Douglas Carl, Kline, John L., Khan, Shahab F., Schoff, Mike, Hoppe, Martin, Fierro, Franklin, Randolph, Randall Blaine, Patterson, Brian M., Kuettner, Lindsey Ann, Sacks, Ryan Foster, Dodd, Evan S., Wan, Willow Chilim, Palaniyappan, Sasikumar, Batha, Steven H., Keiter, Paul Arthur, Rygg, J. Ryan, Smalyuk, Vladimir, Ping, Yuan, and Amendt, Peter. Wed .
"Experimental study of energy transfer in double shell implosions". United States. https://doi.org/10.1063/1.5086674. https://www.osti.gov/servlets/purl/1532713.
@article{osti_1532713,
title = {Experimental study of energy transfer in double shell implosions},
author = {Merritt, Elizabeth Catherine and Sauppe, Joshua Paul and Loomis, Eric Nicholas and Cardenas, Tana and Montgomery, David S. and Daughton, William Scott and Wilson, Douglas Carl and Kline, John L. and Khan, Shahab F. and Schoff, Mike and Hoppe, Martin and Fierro, Franklin and Randolph, Randall Blaine and Patterson, Brian M. and Kuettner, Lindsey Ann and Sacks, Ryan Foster and Dodd, Evan S. and Wan, Willow Chilim and Palaniyappan, Sasikumar and Batha, Steven H. and Keiter, Paul Arthur and Rygg, J. Ryan and Smalyuk, Vladimir and Ping, Yuan and Amendt, Peter},
abstractNote = {Advances in target fabrication have made double shell capsule implosions a viable platform to study burning fusion plasmas. Central to the double shell capsule is a high-Z (e.g., Au) metal pusher that accesses the volume-burn regime by reducing radiative losses through radiation trapping and compressing a uniform fuel volume at reduced velocities. A double shell implosion relies on a series of energy transfer processes starting from x-ray absorption by the outer shell, followed by transfer of kinetic energy to an inner shell, and finally conversion of kinetic energy to fuel internal energy. We present simulation and experimental results on momentum transfer to different layers in a double shell. We also present the details of the development of the NIF cylindrical hohlraum double shell platform including an imaging shell design with a mid-Z inner shell necessary for imaging the inner shell shape and the trajectory with the current 2DConA platform capability. We examine 1D energy transfer between shell layers using trajectory measurements from a series of surrogate targets; the series builds to a complete double shell layer by layer, isolating the physics of each step of the energy transfer process. Here, the measured energy transfer to the foam cushion and the inner shell suggests that our radiation-hydrodynamics simulations capture most of the relevant collision physics. With a 1 MJ laser drive, the experimental data indicate that 22% ± 3% of the ablator kinetic energy couples into inner shell KE, compared to a 27% ± 2% coupling in our xRAGE simulations. Thus, our xRAGE simulations match experimental energy transfer to ~5%, without inclusion of higher order 2D and 3D effects.},
doi = {10.1063/1.5086674},
journal = {Physics of Plasmas},
number = 5,
volume = 26,
place = {United States},
year = {Wed May 08 00:00:00 EDT 2019},
month = {Wed May 08 00:00:00 EDT 2019}
}
Web of Science
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