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

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.

doi:10.1103/PhysRevE.98.033210

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

Journal Article · 24 September 2018 · Physical Review E

DOI: https://doi.org/10.1103/PhysRevE.98.033210 · OSTI ID:1476297

Shang, W. L. ^[1]; Stoeckl, C. ^[2]; Betti, R. ^[3]; Regan, S. P. ^[2]; Sangster, T. C. ^[2]; Hu, S. X. ^[2]; Christopherson, A. ^[3]; Gopalaswamy, V. ^[3]; Hu, S. X. ^[2]; Seka, W. ^[2]; Michel, D. T. ^[2]; Davis, A. K. ^[2]; Radha, P. B. ^[2]; Marshall, F. J. ^[2]; Epstein, R. ^[2]; Solodov, A. A. ^[2]

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; Laboratory or Laser Energetics, University of Rochester
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Univ. of Rochester, NY (United States). Lab. for Laser Energetics and Fusion Science Center

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.

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Research Organization:: Univ. of Rochester, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE National Nuclear Security Administration (NNSA); New York State Energy Research and Development Authority (NYSERDA); National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: NA0001944; FC02-04ER54789

OSTI ID:: 1476297

Alternate ID(s):: OSTI ID: 1473985

Report Number(s):: 2017--106, 1435; {"2017-106, 1435, 2393","Journal ID: ISSN PLEEE8","Journal ID: ISSN 2470-0045"}

Journal Information:: Physical Review E, Journal Name: Physical Review E Journal Issue: 3 Vol. 98; ISSN PLEEE8; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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