Properties of hot-spot emission in a warm plastic-shell implosion on the OMEGA laser system

被引：4

作者：

Shang, W. L. ^{[1
,2
,3
]}

Stoeckl, C. ^{[3
]}

Betti, R. ^{[2
,3
]}

Regan, S. P. ^{[3
]}

Sangster, T. C. ^{[3
]}

Hu, S. X. ^{[3
]}

Christopherson, A. ^{[2
,3
]}

Gopalaswamy, V ^{[2
,3
]}

Cao, D. ^{[3
]}

Seka, W. ^{[3
]}

Michel, D. T. ^{[3
]}

Davis, A. K. ^{[3
]}

Radha, P. B. ^{[3
]}

Marshall, F. J. ^{[3
]}

Epstein, R. ^{[3
]}

Solodov, A. A. ^{[3
]}

机构：

[1] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China

[2] Univ Rochester, Fus Sci Ctr, Rochester, NY 14623 USA

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

来源：

PHYSICAL REVIEW E | 2018年 / 98卷 / 03期

基金：

中国国家自然科学基金;

关键词：

INERTIAL-CONFINEMENT FUSION; UNIFORMITY; MIX;

D O I：

10.1103/PhysRevE.98.033210

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：

A warm plastic-shell implosion is performed on the OMEGA laser system. The measured corona plasma evolution and shell trajectory in the acceleration phase are reasonably simulated by the one-dimensional LILAC simulation including the nonlocal and cross-beam energy transfer models. The results from analytical thin-shell model reproduce the time-dependent shell radius by LILAC simulation and also the hot-spot x-ray-emissivity profile at stagnation predicted by SPECT3D. In the SPECT3D simulations within a clean implosion, a U-shaped hot-spot radius evolution can be observed with the Kirkpatrick-Baez microscope response (the photon energy is from 4 to 8 keV). However, a fading-away hot-spot radius evolution is measured in OMEGA warm plastic-shell implosion because of mixings. To recover the measured hot-spot x-ray emissivity profile at stagnation, a nonisobaric hot-spot model is built and the normalized hot-spot temperature, density, and pressure profiles (normalized to the corresponding target-center values) are obtained.

引用

页数：9

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