A method for diagnosing the implosion symmetry in inertial confinement fusion with wide-angle VISAR

被引：0

作者：

Yuji, Wu ^{[1
]}

Zanyang, Guan ^{[2
]}

Qing, Zhang ^{[1
]}

Longfei, Jing ^{[2
]}

Kuan, Ren ^{[2
]}

Juxi, Liang ^{[2
]}

Xudan, Chen ^{[1
]}

Yulong, Li ^{[2
]}

Feng, Wang ^{[2
]}

机构：

[1] Rocket Force Univ Engn, Sch Nucl Engn, Xian 710025, Peoples R China

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

来源：

NUCLEAR FUSION | 2025年 / 65卷 / 02期

基金：

中国国家自然科学基金;

关键词：

VISAR; wide-angle diagnosis; implosion symmetry; Legendre expansion; inertial confinement fusion;

D O I：

10.1088/1741-4326/adaa87

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 method for diagnosing implosion symmetry in inertial confinement fusion (ICF) with wide-angle velocity interferometer system for any reflector (VISAR)was proposed in this study. The method considers the object-image relationship of the wide-angle VISAR, characteristics of the fringe pattern, and the symmetry theory; the fringe pattern must be continuous in space to apply this method. Hydrodynamic calculations showed that the radiation-temperature distribution on the surface of capsule was spatially continuous, indirectly proving the applicability of the method. The evolution of P2 asymmetry at different positions of the capsule was examined through an eight-beam laser indirect-drive experiment at a 10 kJ-level laser facility, proving the feasibility of the method. The application of wide-angle VISAR for the diagnosis of implosion symmetry in ICF was more accurate and intuitive and demonstrated high spatiotemporal resolution and wide detection range. This method can provide reference data for the micro-mechanism study of hydrodynamic instability and radiation-driven asymmetry, as well as support for optimizing the implosion compression process to achieve efficient and stable ignition.

引用

页数：9

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