Validation of implosion modeling through direct-drive shock timing experiments at the National Ignition Facility

被引：0

作者：

Srinivasan, A. ^{[1
]}

Boehly, T. R. ^{[1
,3
]}

Marshall, M. C. ^{[1
]}

Polsin, D. N. ^{[1
]}

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

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

Shvydky, A. ^{[1
]}

Cao, D. ^{[1
]}

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

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

Marozas, J. ^{[1
]}

Miller, S. ^{[1
]}

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

Celliers, P. M. ^{[2
]}

Fratanduono, D. E. ^{[2
]}

Hohenberger, M. ^{[2
]}

机构：

[1] Univ Rochester, Lab Laser Energet, Rochester, NY 14623 USA

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

[3] CALTECH, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW E | 2024年 / 109卷 / 04期

关键词：

Compendex;

D O I：

10.1103/PhysRevE.109.045209

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：

Precise modeling of shocks in inertial confinement fusion implosions is critical for obtaining the desired compression in experiments. Shock velocities and postshock conditions are determined by laser-energy deposition, heat conduction, and equations of state. This paper describes experiments at the National Ignition Facility (NIF) [E. M. Campbell and W. J. Hogan, Plasma Phys. Control. Fusion 41, B39 (1999)] where multiple shocks are launched into a cone-in-shell target made of polystyrene, using laser-pulse shapes with two or three pickets and varying on-target intensities. Shocks are diagnosed using the velocity interferometric system for any reflector (VISAR) diagnostic [P. M. Celliers et al., Rev. Sci. Instrum. 75, 4916 (2004)]. Simulated and inferred shock velocities agree well for the range of intensities studied in this work. These directly-driven shock-timing experiments on the NIF provide a good measure of early-time laser-energy coupling. The validated models add to the credibility of direct-drive-ignition designs at the megajoule scale.

引用

页数：8

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