2D X-Ray Radiography of Imploding Capsules at the National Ignition Facility

被引：171

作者：

Rygg, J. R. ^{[1
]}

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

Field, J. E. ^{[1
]}

Barrios, M. A. ^{[1
]}

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

Collins, G. W. ^{[1
]}

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

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

Kline, J. L. ^{[2
]}

Kroll, J. J. ^{[1
]}

Landen, O. L. ^{[1
]}

Ma, T. ^{[1
]}

Pak, A. ^{[1
]}

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

Raman, K. ^{[1
]}

Town, R. P. J. ^{[1
]}

Bradley, D. K. ^{[1
]}

机构：

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

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 19期

关键词：

INERTIAL CONFINEMENT FUSION; NOVA HOHLRAUMS; TARGETS; SYMMETRY; DRIVE;

D O I：

10.1103/PhysRevLett.112.195001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

First measurements of the in-flight shape of imploding inertial confinement fusion (ICF) capsules at the National Ignition Facility (NIF) were obtained by using two-dimensional x-ray radiography. The sequence of area-backlit, time-gated pinhole images is analyzed for implosion velocity, low-mode shape and density asymmetries, and the absolute offset and center-of-mass velocity of the capsule shell. The in-flight shell is often observed to be asymmetric even when the concomitant core self-emission is round. A similar to 15 mu m shell asymmetry amplitude of the Y-40 spherical harmonic mode was observed for standard NIF ICF hohlraums at a shell radius of similar to 200 mu m (capsule at similar to 5x radial compression). This asymmetry is mitigated by a similar to 10% increase in the hohlraum length.

引用

页数：5

共 25 条

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