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Title: A strategy for reducing stagnation phase hydrodynamic instability growth in inertial confinement fusion implosions

Abstract

Encouraging progress is being made in demonstrating control of ablation front hydrodynamic instability growth in inertial confinement fusion implosion experiments on the National Ignition Facility [E. I. Moses, R. N. Boyd, B. A. Remington, C. J. Keane, and R. Al-Ayat, Phys. Plasmas 16, 041006 (2009)]. Even once ablation front stabilities are controlled, however, instability during the stagnation phase of the implosion can still quench ignition. A scheme is proposed to reduce the growth of stagnation phase instabilities through the reverse of the “adiabat shaping” mechanism proposed to control ablation front growth. Two-dimensional radiation hydrodynamics simulations confirm that improved stagnation phase stability should be possible without compromising fuel compression.

Authors:
; ;  [1]
  1. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550 (United States)
Publication Date:
OSTI Identifier:
22410322
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; COMPRESSION; CONTROL; HYDRODYNAMICS; IMPLOSIONS; INERTIAL CONFINEMENT; INSTABILITY GROWTH RATES; PHASE STABILITY; PLASMA SIMULATION; STAGNATION; TWO-DIMENSIONAL CALCULATIONS; US NATIONAL IGNITION FACILITY

Citation Formats

Clark, D. S., Robey, H. F., and Smalyuk, V. A. A strategy for reducing stagnation phase hydrodynamic instability growth in inertial confinement fusion implosions. United States: N. p., 2015. Web. doi:10.1063/1.4921134.
Clark, D. S., Robey, H. F., & Smalyuk, V. A. A strategy for reducing stagnation phase hydrodynamic instability growth in inertial confinement fusion implosions. United States. doi:10.1063/1.4921134.
Clark, D. S., Robey, H. F., and Smalyuk, V. A. Fri . "A strategy for reducing stagnation phase hydrodynamic instability growth in inertial confinement fusion implosions". United States. doi:10.1063/1.4921134.
@article{osti_22410322,
title = {A strategy for reducing stagnation phase hydrodynamic instability growth in inertial confinement fusion implosions},
author = {Clark, D. S. and Robey, H. F. and Smalyuk, V. A.},
abstractNote = {Encouraging progress is being made in demonstrating control of ablation front hydrodynamic instability growth in inertial confinement fusion implosion experiments on the National Ignition Facility [E. I. Moses, R. N. Boyd, B. A. Remington, C. J. Keane, and R. Al-Ayat, Phys. Plasmas 16, 041006 (2009)]. Even once ablation front stabilities are controlled, however, instability during the stagnation phase of the implosion can still quench ignition. A scheme is proposed to reduce the growth of stagnation phase instabilities through the reverse of the “adiabat shaping” mechanism proposed to control ablation front growth. Two-dimensional radiation hydrodynamics simulations confirm that improved stagnation phase stability should be possible without compromising fuel compression.},
doi = {10.1063/1.4921134},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}