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

Journal Article · · Physical Review E
 [1];  [2];  [3];  [2];  [2];  [2];  [3];  [3];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  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
+ Show Author Affiliations

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.

Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
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 (NSFC)
Grant/Contract Number:
NA0001944; FC02-04ER54789; YZJJLX 2016007; 11775203
OSTI ID:
1476297
Alternate ID(s):
OSTI ID: 1473985
Report Number(s):
2017-106, 1435; PLEEE8; 2017-106, 1435, 2393
Journal Information:
Physical Review E, Vol. 98, Issue 3; ISSN 2470-0045
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

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Figures / Tables (12)

FIG. 1(p. 2)figure FIG. 1
FIG. 2(p. 2)figure FIG. 2
FIG. 3(p. 3)figure FIG. 3
FIG. 4(p. 3)figure FIG. 4
FIG. 5(p. 4)figure FIG. 5
FIG. 6(p. 5)figure FIG. 6
FIG. 7(p. 5)figure FIG. 7
FIG. 10(p. 6)figure FIG. 10
FIG. 8(p. 6)figure FIG. 8
FIG. 9(p. 6)figure FIG. 9
FIG. 11(p. 7)figure FIG. 11
FIG. 12(p. 7)figure FIG. 12

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
direct drive
intertial confinement fusion
x-ray generation in plasmas