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

Journal Article · Fri May 15 04:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4921134· OSTI ID:22410322

Clark, D. S.; Robey, H. F.; Smalyuk, V. A. ^[1]

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1. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550 (United States)

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.

• OSTI ID: 22410322
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 22; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

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