The importance of Righi–Leduc heat flux to the ablative Rayleigh–Taylor instability during a laser irradiating targets

Ye Cui; Xiao-Hu Yang; Yan-Yun Ma; Guo-Bo Zhang; Bi-Hao Xu; Ze-Hao Chen; Ze Li; Fu-Qiu Shao; Jie Zhang

doi:10.1017/hpl.2024.3

High Power Laser Science and Engineering (Jan 2024)

The importance of Righi–Leduc heat flux to the ablative Rayleigh–Taylor instability during a laser irradiating targets

Ye Cui,
Xiao-Hu Yang,
Yan-Yun Ma,
Guo-Bo Zhang,
Bi-Hao Xu,
Ze-Hao Chen,
Ze Li,
Fu-Qiu Shao,
Jie Zhang

Affiliations

Ye Cui: ORCiD; Department of Nuclear Science and Technology, National University of Defense Technology, Changsha, China
Xiao-Hu Yang: Department of Nuclear Science and Technology, National University of Defense Technology, Changsha, China Collaborative Innovation Centre of IFSA, Shanghai Jiao Tong University, Shanghai, China
Yan-Yun Ma: College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China Collaborative Innovation Centre of IFSA, Shanghai Jiao Tong University, Shanghai, China
Guo-Bo Zhang: ORCiD; Department of Nuclear Science and Technology, National University of Defense Technology, Changsha, China
Bi-Hao Xu: Department of Nuclear Science and Technology, National University of Defense Technology, Changsha, China
Ze-Hao Chen: Department of Nuclear Science and Technology, National University of Defense Technology, Changsha, China
Ze Li: Department of Nuclear Science and Technology, National University of Defense Technology, Changsha, China
Fu-Qiu Shao: Department of Physics, National University of Defense Technology, Changsha, China
Jie Zhang: Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China Collaborative Innovation Centre of IFSA, Shanghai Jiao Tong University, Shanghai, China

DOI: https://doi.org/10.1017/hpl.2024.3
Journal volume & issue: Vol. 12

Abstract

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The Righi–Leduc heat flux generated by the self-generated magnetic field in the ablative Rayleigh–Taylor instability driven by a laser irradiating thin targets is studied through two-dimensional extended-magnetohydrodynamic simulations. The perturbation structure gets into a low magnetization state though the peak strength of the self-generated magnetic field could reach hundreds of teslas. The Righi–Leduc effect plays an essential impact both in the linear and nonlinear stages, and it deflects the total heat flux towards the spike base. Compared to the case without the self-generated magnetic field included, less heat flux is concentrated at the spike tip, finally mitigating the ablative stabilization and leading to an increase in the velocity of the spike tip. It is shown that the linear growth rate is increased by about 10% and the amplitude during the nonlinear stage is increased by even more than 10% due to the feedback of the magnetic field, respectively. Our results reveal the importance of Righi–Leduc heat flux to the growth of the instability and promote deep understanding of the instability evolution together with the self-generated magnetic field, especially during the acceleration stage in inertial confinement fusion.

Published in High Power Laser Science and Engineering

ISSN: 2095-4719 (Print); 2052-3289 (Online)
Publisher: Cambridge University Press
Country of publisher: United Kingdom
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: https://www.cambridge.org/core/journals/high-power-laser-science-and-engineering

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