Direct drive: Simulations and results from the National Ignition Facility

被引：38

作者：

Radha, P. B. ^{[1
]}

Hohenberger, M. ^{[1
]}

Edgell, D. H. ^{[1
]}

Marozas, J. A. ^{[1
]}

Marshall, F. J. ^{[1
]}

Michel, D. T. ^{[1
]}

Rosenberg, M. J. ^{[1
]}

Seka, W. ^{[1
]}

Shvydky, A. ^{[1
]}

Boehly, T. R. ^{[1
]}

Collins, T. J. B. ^{[1
]}

Campbell, E. M. ^{[1
]}

Craxton, R. S. ^{[1
]}

Delettrez, J. A. ^{[1
]}

Dixit, S. N. ^{[2
]}

Frenje, J. A. ^{[3
]}

Froula, D. H. ^{[1
]}

Goncharov, V. N. ^{[1
]}

Hu, S. X. ^{[1
]}

Knauer, J. P. ^{[1
]}

McCrory, R. L. ^{[1
]}

McKenty, P. W. ^{[1
]}

Meyerhofer, D. D. ^{[4
]}

Moody, J. ^{[2
]}

Myatt, J. F. ^{[1
]}

Petrasso, R. D. ^{[3
]}

Regan, S. P. ^{[1
]}

Sangster, T. C. ^{[1
]}

Sio, H. ^{[3
]}

Skupsky, S. ^{[1
]}

Zylstra, A. ^{[3
]}

机构：

[1] Univ Rochester, Laser Energet Lab, 250 E River Rd, Rochester, NY 14623 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] MIT, Plasma Fus Sci Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[4] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA

来源：

PHYSICS OF PLASMAS | 2016年 / 23卷 / 05期

关键词：

INERTIAL CONFINEMENT FUSION; RAYLEIGH-TAYLOR INSTABILITY; POLAR-DIRECT-DRIVE; LASER; TRANSPORT; OMEGA;

D O I：

10.1063/1.4946023

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：

Direct-drive implosion physics is being investigated at the National Ignition Facility. The primary goal of the experiments is twofold: to validate modeling related to implosion velocity and to estimate the magnitude of hot-electron preheat. Implosion experiments indicate that the energetics is well-modeled when cross-beam energy transfer (CBET) is included in the simulation and an overall multiplier to the CBET gain factor is employed; time-resolved scattered light and scattered-light spectra display the correct trends. Trajectories from backlit images are well modeled, although those from measured self-emission images indicate increased shell thickness and reduced shell density relative to simulations. Sensitivity analyses indicate that the most likely cause for the density reduction is nonuniformity growth seeded by laser imprint and not laser-energy coupling. Hot-electron preheat is at tolerable levels in the ongoing experiments, although it is expected to increase after the mitigation of CBET. Future work will include continued model validation, imprint measurements, and mitigation of CBET and hot-electron preheat. Published by AIP Publishing.

引用

页数：12

共 50 条

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