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Title: Effects of residual kinetic energy on yield degradation and ion temperature asymmetries in inertial confinement fusion implosions

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5026706· OSTI ID:1437598
ORCiD logo [1];  [2];  [3]; ORCiD logo [4];  [5];  [6]; ORCiD logo [7]; ORCiD logo [1]; ORCiD logo [8]; ORCiD logo [8];  [8];  [8]; ORCiD logo [8];  [8]; ORCiD logo [8]; ORCiD logo [5];  [5];  [9];  [10]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics. Dept. of Physics and Astronomy
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics. Dept. of Physics and Astronomy. Dept. of Mechanical Engineering
  3. Ben-Gurion Univ. of the Negev, Beer-Sheva (Israel). Dept. of Mechanical Engineering; Nuclear Research Center-Negev, Beer-Sheva (Israel). Dept. of Physics
  4. Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Univ. of Michigan, Ann Arbor, MI (United States)
  5. Univ. of Rochester, NY (United States). Lab. for Laser Energetics. Dept. of Mechanical Engineering
  6. Univ. of Science and Technology of China, Hefei (China). Dept. of Modern Mechanics
  7. National Cheng Kung Univ., Tainan (Taiwan). Inst. of Space and Plasma Sciences
  8. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  9. Technical Univ. of Madrid (Spain)
  10. Univ. of Rochester, NY (United States). Dept. of Mechanical Engineering

The study of Rayleigh–Taylor instability in the deceleration phase of inertial confinement fusion implosions is carried out using the three-dimensional (3-D) radiation-hydrodynamic Eulerian parallel code DEC3D. In this paper, we show that the yield-over-clean is a strong function of the residual kinetic energy (RKE) for low modes. Our analytical models indicate that the behavior of larger hot-spot volumes observed in low modes and the consequential pressure degradation can be explained in terms of increasing the RKE. These results are derived using a simple adiabatic implosion model of the deceleration phase as well as through an extensive set of 3-D single-mode simulations using the code DEC3D. The effect of the bulk velocity broadening on ion temperature asymmetries is analyzed for different mode numbers = 1 -12. The jet observed in low mode = 1 is shown to cause the largest ion temperature variation in the mode spectrum. Finally, the vortices of high modes within the cold bubbles are shown to cause lower ion temperature variations than low modes.

Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
NA0001944; SC0014318
OSTI ID:
1437598
Alternate ID(s):
OSTI ID: 1436556
Journal Information:
Physics of Plasmas, Vol. 25, Issue 5; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Cited By (5)

Tripled yield in direct-drive laser fusion through statistical modelling journal January 2019
Analysis of trends in experimental observables: Reconstruction of the implosion dynamics and implications for fusion yield extrapolation for direct-drive cryogenic targets on OMEGA journal June 2018
A theoretical model for low-mode asymmetries in ICF implosions journal February 2019
Analysis of NIF scaling using physics informed machine learning journal January 2020
Kinetic simulations of fusion ignition with hot-spot ablator mix journal September 2019