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Title: First experiments on Revolver shell collisions at the OMEGA laser

Abstract

The results of recent experiments on the OMEGA laser are presented, demonstrating the ablator-driver shell collision relevant to the outer two shells of the Revolver triple-shell inertial-confinement-fusion concept [K. Molvig et al., Phys. Rev. Lett. 116, 255003 (2016)]. These nested two-shell experiments measured the pre and postcollision outer-surface trajectory of the 7.19 g/cc chromium inner shell. Measurements of the shell trajectory are in excellent agreement with simulations; the measured outer-surface velocity was 7.52 ± 0.59 cm/μs compared to the simulated value of 7.27 cm/μs. Agreement between the measurements and simulations provides confidence in our ability to model collisions with features which have not been validated previously. Notable features include the absence of ~40 mg/cc foam between shells commonly used in double shell experiments, a dense (7.19 g/cc) inner shell representative of the densities to be used at full scale, approximately mass matched ablator payload and inner shells, and the inclusion of a tamping-layer-like cushion layer for the express purpose of reducing the transfer of high mode growth to the driver shell and mediation of the shell collision. These experiments test the modeling of the radiative heating, expansion, recompression, and acceleration of the chromium inner shell. Agreement of experimental measurements withmore » simulation improves our confidence in the models used to design the Revolver ignition target.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1];  [3];  [3];  [3]; ORCiD logo [1]; ORCiD logo [4];  [5]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Nevada National Security Site, Santa Barbara, CA (United States)
  3. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1558974
Alternate Identifier(s):
OSTI ID: 1567980
Report Number(s):
LA-UR-19-23222
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 7; 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

Citation Formats

Scheiner, Brett Stanford, Schmitt, Mark J., Hsu, Scott C., Schmidt, Derek William, Mance, Jason, Wilde, Carl Huerstel, Polsin, D. N., Boehly, T. R., Marshall, Frederick, Krasheninnikova, Natalia, Molvig, Kim, and Huang, H. First experiments on Revolver shell collisions at the OMEGA laser. United States: N. p., 2019. Web. doi:10.1063/1.5099975.
Scheiner, Brett Stanford, Schmitt, Mark J., Hsu, Scott C., Schmidt, Derek William, Mance, Jason, Wilde, Carl Huerstel, Polsin, D. N., Boehly, T. R., Marshall, Frederick, Krasheninnikova, Natalia, Molvig, Kim, & Huang, H. First experiments on Revolver shell collisions at the OMEGA laser. United States. doi:10.1063/1.5099975.
Scheiner, Brett Stanford, Schmitt, Mark J., Hsu, Scott C., Schmidt, Derek William, Mance, Jason, Wilde, Carl Huerstel, Polsin, D. N., Boehly, T. R., Marshall, Frederick, Krasheninnikova, Natalia, Molvig, Kim, and Huang, H. Tue . "First experiments on Revolver shell collisions at the OMEGA laser". United States. doi:10.1063/1.5099975.
@article{osti_1558974,
title = {First experiments on Revolver shell collisions at the OMEGA laser},
author = {Scheiner, Brett Stanford and Schmitt, Mark J. and Hsu, Scott C. and Schmidt, Derek William and Mance, Jason and Wilde, Carl Huerstel and Polsin, D. N. and Boehly, T. R. and Marshall, Frederick and Krasheninnikova, Natalia and Molvig, Kim and Huang, H.},
abstractNote = {The results of recent experiments on the OMEGA laser are presented, demonstrating the ablator-driver shell collision relevant to the outer two shells of the Revolver triple-shell inertial-confinement-fusion concept [K. Molvig et al., Phys. Rev. Lett. 116, 255003 (2016)]. These nested two-shell experiments measured the pre and postcollision outer-surface trajectory of the 7.19 g/cc chromium inner shell. Measurements of the shell trajectory are in excellent agreement with simulations; the measured outer-surface velocity was 7.52 ± 0.59 cm/μs compared to the simulated value of 7.27 cm/μs. Agreement between the measurements and simulations provides confidence in our ability to model collisions with features which have not been validated previously. Notable features include the absence of ~40 mg/cc foam between shells commonly used in double shell experiments, a dense (7.19 g/cc) inner shell representative of the densities to be used at full scale, approximately mass matched ablator payload and inner shells, and the inclusion of a tamping-layer-like cushion layer for the express purpose of reducing the transfer of high mode growth to the driver shell and mediation of the shell collision. These experiments test the modeling of the radiative heating, expansion, recompression, and acceleration of the chromium inner shell. Agreement of experimental measurements with simulation improves our confidence in the models used to design the Revolver ignition target.},
doi = {10.1063/1.5099975},
journal = {Physics of Plasmas},
number = 7,
volume = 26,
place = {United States},
year = {2019},
month = {7}
}

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