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Title: Properties of hot-spot emission in a warm plastic-shell implosion on the OMEGA laser system

Abstract

A warm plastic-shell implosion was performed on the OMEGA laser system. The measured corona plasma evolution and shell trajectory in the acceleration phase are reasonably simulated by the one-dimensional LILAC simulation including the nonlocal and cross-beam energy transfer models. The results from analytical thin-shell model reproduce the time-dependent shell radius by LILAC simulation, and also the hot-spot x-ray emissivity profile at stagnation predicted by Spect3D. In the Spect3D simulations within a clean implosion, a “U”-shaped hot-spot radius evolution can be observed with the Kirkpatrick-Baez microscope response (the photon energy is from 4 to 8 keV). However, a fading away hot-spot radius evolution was measured in OMEGA warm plastic-shell implosion because of mixings. In order to recover the measured hot-spot x-ray emissivity profile at stagnation, a non-isobaric hot-spot model is built, and the normalized hot-spot temperature, density, and pressure profiles (normalized to the corresponding target-center values) are obtained.

Authors:
 [1];  [2];  [3];  [2];  [2];  [2];  [3];  [3];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
+ Show Author Affiliations
  1. China Academy of Engineering Physics, Mianyang (China). Research Center of Laser Fusion; Univ. of Rochester, NY (United States). Lab. for Laser Energetics and Fusion Science Center
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  3. Univ. of Rochester, NY (United States). Lab. for Laser Energetics and Fusion Science Center
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA); New York State Energy Research and Development Authority (NYSERDA); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1476297
Alternate Identifier(s):
OSTI ID: 1473985
Report Number(s):
2017-106, 1435
Journal ID: ISSN 2470-0045; PLEEE8; 2017-106, 1435, 2393
Grant/Contract Number:  
NA0001944; FC02-04ER54789; YZJJLX 2016007; 11775203
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 98; Journal Issue: 3; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; direct drive; intertial confinement fusion; x-ray generation in plasmas

Citation Formats

Shang, W. L., Stoeckl, C., Betti, R., Regan, S. P., Sangster, T. C., Hu, S. X., Christopherson, A., Gopalaswamy, V., Hu, S. X., Seka, W., Michel, D. T., Davis, A. K., Radha, P. B., Marshall, F. J., Epstein, R., and Solodov, A. A. Properties of hot-spot emission in a warm plastic-shell implosion on the OMEGA laser system. United States: N. p., 2018. Web. https://doi.org/10.1103/PhysRevE.98.033210.
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Shang, W. L., Stoeckl, C., Betti, R., Regan, S. P., Sangster, T. C., Hu, S. X., Christopherson, A., Gopalaswamy, V., Hu, S. X., Seka, W., Michel, D. T., Davis, A. K., Radha, P. B., Marshall, F. J., Epstein, R., & Solodov, A. A. Properties of hot-spot emission in a warm plastic-shell implosion on the OMEGA laser system. United States. https://doi.org/10.1103/PhysRevE.98.033210
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Shang, W. L., Stoeckl, C., Betti, R., Regan, S. P., Sangster, T. C., Hu, S. X., Christopherson, A., Gopalaswamy, V., Hu, S. X., Seka, W., Michel, D. T., Davis, A. K., Radha, P. B., Marshall, F. J., Epstein, R., and Solodov, A. A. Tue . "Properties of hot-spot emission in a warm plastic-shell implosion on the OMEGA laser system". United States. https://doi.org/10.1103/PhysRevE.98.033210. https://www.osti.gov/servlets/purl/1476297.
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@article{osti_1476297,
title = {Properties of hot-spot emission in a warm plastic-shell implosion on the OMEGA laser system},
author = {Shang, W. L. and Stoeckl, C. and Betti, R. and Regan, S. P. and Sangster, T. C. and Hu, S. X. and Christopherson, A. and Gopalaswamy, V. and Hu, S. X. and Seka, W. and Michel, D. T. and Davis, A. K. and Radha, P. B. and Marshall, F. J. and Epstein, R. and Solodov, A. A.},
abstractNote = {A warm plastic-shell implosion was performed on the OMEGA laser system. The measured corona plasma evolution and shell trajectory in the acceleration phase are reasonably simulated by the one-dimensional LILAC simulation including the nonlocal and cross-beam energy transfer models. The results from analytical thin-shell model reproduce the time-dependent shell radius by LILAC simulation, and also the hot-spot x-ray emissivity profile at stagnation predicted by Spect3D. In the Spect3D simulations within a clean implosion, a “U”-shaped hot-spot radius evolution can be observed with the Kirkpatrick-Baez microscope response (the photon energy is from 4 to 8 keV). However, a fading away hot-spot radius evolution was measured in OMEGA warm plastic-shell implosion because of mixings. In order to recover the measured hot-spot x-ray emissivity profile at stagnation, a non-isobaric hot-spot model is built, and the normalized hot-spot temperature, density, and pressure profiles (normalized to the corresponding target-center values) are obtained.},
doi = {10.1103/PhysRevE.98.033210},
journal = {Physical Review E},
number = 3,
volume = 98,
place = {United States},
year = {2018},
month = {9}
}
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https://doi.org/10.1103/PhysRevE.98.033210
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Figures / Tables:

FIG. 1 FIG. 1: (a) Target and (b) laser pulse intensity in the experiment. A fill tube of 30 $μ$m outer diameter was used.
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