Radiation hydrodynamics modeling of the highest compression inertial confinement fusion ignition experiment from the National Ignition Campaign

被引：136

作者：

Clark, D. S. ^{[1
]}

Marinak, M. M. ^{[1
]}

Weber, C. R. ^{[1
]}

Eder, D. C. ^{[1
]}

Haan, S. W. ^{[1
]}

Hammel, B. A. ^{[1
]}

Hinkel, D. E. ^{[1
]}

Jones, O. S. ^{[1
]}

Milovich, J. L. ^{[1
]}

Patel, P. K. ^{[1
]}

Robey, H. F. ^{[1
]}

Salmonson, J. D. ^{[1
]}

Sepke, S. M. ^{[1
]}

Thomas, C. A. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

来源：

PHYSICS OF PLASMAS | 2015年 / 22卷 / 02期

关键词：

SIMULATIONS; TARGETS; INSTABILITY; GROWTH;

D O I：

10.1063/1.4906897

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The recently completed National Ignition Campaign (NIC) on the National Ignition Facility (NIF) showed significant discrepancies between post-shot simulations of implosion performance and experimentally measured performance, particularly in thermonuclear yield. This discrepancy between simulation and observation persisted despite concerted efforts to include all of the known sources of performance degradation within a reasonable two-dimensional (2-D), and even three-dimensional (3-D), simulation model, e.g., using measured surface imperfections and radiation drives adjusted to reproduce observed implosion trajectories [Clark et al., Phys. Plasmas 20, 056318 (2013)]. Since the completion of the NIC, several effects have been identified that could explain these discrepancies and that were omitted in previous simulations. In particular, there is now clear evidence for larger than anticipated long-wavelength radiation drive asymmetries and a larger than expected perturbation seeded by the capsule support tent. This paper describes an updated suite of one-dimensional (1-D), 2-D, and 3-D simulations that include the current best understanding of these effects identified since the NIC, as applied to a specific NIC shot. The relative importance of each effect on the experimental observables is compared. In combination, these effects reduce the simulated-to-measured yield ratio from 125:1 in 1-D to 1.5:1 in 3-D, as compared to 15:1 in the best 2-D simulations published previously. While the agreement with the experimental data remains imperfect, the comparison to the data is significantly improved and suggests that the largest sources for the previous discrepancies between simulation and experiment are now being included. (C) 2015 AIP Publishing LLC.

引用

页数：18

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