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Title: Measurements of the conduction-zone length and mass ablation rate in cryogenic direct-drive implosions on OMEGA

Abstract

Measurements of the conduction-zone length (110 ± 20 μm at t = 2.8 ns), the averaged mass ablation rate of the deuterated plastic (7.95 ± 0.3 μg/ns), shell trajectory, and laser absorption are made in direct-drive cryogenic implosions and are used to quantify the electron thermal transport through the conduction zone. Hydrodynamic simulations that use nonlocal thermal transport and cross-beam energy transfer models reproduce these experimental observables. Hydrodynamic simulations that use a time-dependent flux-limited model reproduce the measured shell trajectory and the laser absorption but underestimate the mass ablation rate by ~10% and the length of the conduction zone by nearly a factor of 2.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics.
Publication Date:
Research Org.:
Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics.
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1178087
DOE Contract Number:  
NA0001944
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 15; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Michel, D. T., Davis, A. K., Goncharov, V. N., Sangster, T. C., Hu, S. X., Igumenshchev, I. V., Meyerhofer, D. D., Seka, W., and Froula, D. H. Measurements of the conduction-zone length and mass ablation rate in cryogenic direct-drive implosions on OMEGA. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.114.155002.
Michel, D. T., Davis, A. K., Goncharov, V. N., Sangster, T. C., Hu, S. X., Igumenshchev, I. V., Meyerhofer, D. D., Seka, W., & Froula, D. H. Measurements of the conduction-zone length and mass ablation rate in cryogenic direct-drive implosions on OMEGA. United States. https://doi.org/10.1103/PhysRevLett.114.155002
Michel, D. T., Davis, A. K., Goncharov, V. N., Sangster, T. C., Hu, S. X., Igumenshchev, I. V., Meyerhofer, D. D., Seka, W., and Froula, D. H. 2015. "Measurements of the conduction-zone length and mass ablation rate in cryogenic direct-drive implosions on OMEGA". United States. https://doi.org/10.1103/PhysRevLett.114.155002.
@article{osti_1178087,
title = {Measurements of the conduction-zone length and mass ablation rate in cryogenic direct-drive implosions on OMEGA},
author = {Michel, D. T. and Davis, A. K. and Goncharov, V. N. and Sangster, T. C. and Hu, S. X. and Igumenshchev, I. V. and Meyerhofer, D. D. and Seka, W. and Froula, D. H.},
abstractNote = {Measurements of the conduction-zone length (110 ± 20 μm at t = 2.8 ns), the averaged mass ablation rate of the deuterated plastic (7.95 ± 0.3 μg/ns), shell trajectory, and laser absorption are made in direct-drive cryogenic implosions and are used to quantify the electron thermal transport through the conduction zone. Hydrodynamic simulations that use nonlocal thermal transport and cross-beam energy transfer models reproduce these experimental observables. Hydrodynamic simulations that use a time-dependent flux-limited model reproduce the measured shell trajectory and the laser absorption but underestimate the mass ablation rate by ~10% and the length of the conduction zone by nearly a factor of 2.},
doi = {10.1103/PhysRevLett.114.155002},
url = {https://www.osti.gov/biblio/1178087}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 15,
volume = 114,
place = {United States},
year = {2015},
month = {4}
}