Abstract
In an extreme ultraviolet (EUV) vessel, intense heating occurs when a high-power laser irradiates tin droplets, generating extreme thermal pressure gradients that drive complex flow dynamics. This review focuses on two critical aspects governing flow properties and debris transport within the vessel: main shock behavior and thermal expansion dynamics. Key considerations include finite-source shock dynamics, environmental effects on shock propagation, gas contact motion, and interface instabilities. The evolution of the main shock and gas contact is primarily determined by the initial pressure ratio and sound speed ratio between the heat source and ambient gas. Furthermore, Rayleigh-Taylor and Richtmyer-Meshkov instabilities dominate the evolution of gas-gas interfaces. This work presents a comprehensive analysis of the complex flow mechanisms underlying early-stage, high-temperature flow expansion in EUV source vessels.
摘要
在极紫外(EUV)光源腔中, 当高功率激光轰击锡液滴时, 会产生高温热源, 极端的热压梯度驱动产生复杂的流体动力学行为. 本文重点介绍了腔室内影响流动特性和碎屑运输的两个关键物理过程: 主激波传播和热膨胀动力学. 关注的问题主要集中在: 有限大小热源的激波动力学、 环境气体对激波传播的影响、气体界面运动以及界面不稳定性. 主激波和气体界面的演变主要取决于热源和环境气体之间的初始压力比和声速比. 此外, Rayleigh-Taylor和Richtmyer-Meshkov不稳定性主导了气-气界面的演化. 本文全面综述并分析了EUV光源腔中高温热源膨胀初期的复杂流动过程.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11988102, 12432011, 12422208, 12421002, 12372220, 12372219, and 52450304).
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Author contributions Qihang Ma, Kai Leong Chong, Bofu Wang, Jianhua Zhang, and Quan Zhou designed the research. Qihang Ma wrote the first draft of the manuscript. Qihang Ma and Bofu Wang set up the experiment set-up and processed the experiment data. Kai Leong Chong, Bofu Wang, Jianhua Zhang, and Quan Zhou helped organize the manuscript. Qihang Ma, Kai Leong Chong, Bofu Wang, Jianhua Zhang, and Quan Zhou revised and edited the final version.
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Ma, Q., Chong, K.L., Wang, B. et al. Early stage of explosive expansion in extreme ultraviolet source vessel. Acta Mech. Sin. 42, 125295 (2026). https://doi.org/10.1007/s10409-025-25295-x
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DOI: https://doi.org/10.1007/s10409-025-25295-x