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

Abstract

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 $\ell =1$-12. The jet observed in low mode $\ell =1$ 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.

Authors:

Woo, K. M.  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-1124-3871"

Betti, R. ^[2]; Shvarts, D. ^[3]; Bose, A.  ^[4];

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• Search DOE PAGES for ORCID "0000-0001-9529-6219"

Patel, D. ^[5]; Yan, R. ^[6]; Chang, P. -Y.  ^[7];

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• Search DOE PAGES for ORCID "0000-0002-2293-6980"

Mannion, O. M.  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-8029-5109"

Epstein, R.  ^[8];

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• Search DOE PAGES for ORCID "0000-0003-4062-8444"

Delettrez, J. A.  ^[8];

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• Search DOE PAGES for ORCID "0000-0002-5040-4631"

Charissis, M. ^[8]; Anderson, K. S. ^[8]; Radha, P. B.  ^[8];

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• Search DOE PAGES for ORCID "0000-0001-5473-1632"

Shvydky, A. ^[8]; Igumenshchev, I. V.  ^[8];

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• Search DOE PAGES for ORCID "0000-0001-5495-8503"

Gopalaswamy, V.  ^[5];

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• Search DOE PAGES for ORCID "0000-0002-8013-9314"

Christopherson, A. R. ^[5]; Sanz, J. ^[9]; Aluie, H. ^[10]

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+ Show Author Affiliations

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

Publication Date:

Wed May 09 00:00:00 EDT 2018

Research Org.:

Univ. of Rochester, NY (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

OSTI Identifier:

1437598

Alternate Identifier(s):

OSTI ID: 1436556

Grant/Contract Number:  

NA0001944; SC0014318

Resource Type:

Accepted Manuscript

Journal Name:

Physics of Plasmas

Additional Journal Information:

Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 1070-664X

Publisher:

American Institute of Physics (AIP)

Country of Publication:

United States

Language:

English

Subject:

70 PLASMA PHYSICS AND FUSION TECHNOLOGY; subsonic flows; flow instabilities; plasma confinement; plasmas