Update on specifications for NIF ignition targets, and their rollup into an error budget

被引：46

作者：

Haan, SW ^{[1
]}

Herrmann, MC ^{[1
]}

Amendt, PA ^{[1
]}

Callahan, DA ^{[1
]}

Dittrich, TR ^{[1
]}

Edwards, MJ ^{[1
]}

Jones, OS ^{[1
]}

Marinak, MM ^{[1
]}

Munro, DH ^{[1
]}

Pollaine, SM ^{[1
]}

Salmonson, JD ^{[1
]}

Spears, BK ^{[1
]}

Suter, LJ ^{[1
]}

机构：

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

来源：

FUSION SCIENCE AND TECHNOLOGY | 2006年 / 49卷 / 04期

关键词：

D O I：

10.13182/FST49-553

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Targets intended to produce ignition on NIF are being simulated and the simulations are used to set specifications for target fabrication. Recent design work has focused on designs that assume only 1.0 MJ of laser energy instead of the previous 1.6 MJ. To perform with less laser energy, the hohlraum has been redesigned to be more efficient than previously, and the capsules are slightly smaller. The main-line hohlraum design now has a SiO2 foam fill, a wall of U-Dy-Au, and shields mounted between the capsule and the laser entrance holes. Two capsule designs are being considered. One has a layered Cu-doped Be ablator, and the other layered Ge- doped CH. Both can perform acceptably with recently demonstrated ice layer quality, and with recently demonstrated outer surface roughness. Smoothness of the internal interfaces may be an issue for the Be(Cu) design, and it may be necessary either to polish partially coated shells or to improve process control so that the internal layers are smoother. Complete tables of specifications are being prepared for both targets, to be completed this fiscal year. All the specifications are being rolled together into an error budget indicating adequate margin for ignition with the new designs.

引用

页码：553 / 557

页数：5

共 7 条

[1] Increasing robustness of indirect drive capsule designs against short wavelength hydrodynamic instabilities [J].