Min Qi, Su Maogen, Cao Shiquan, Sun Duixiong, O'Sullivan Gerry, Dong Chenzhong
Opt Express. 2018 Mar 19;26(6):7176-7189. doi: 10.1364/OE.26.007176.
The radiation and dynamic properties of C VI, C V, Si VI and Si V ions from laser-produced SiC plasmas in a vacuum are studied both experimentally and theoretically. The EUV emission spectra of SiC plasmas are measured using the spatio-temporally resolved laser-produced plasma spectroscopy technique. To explore the dynamic evolution of highly-charged ions in such plasmas, an extended radiation hydrodynamics model is developed. The comparison of theoretical and experimental time-space evolved spectral profiles provides the temporal evolution of plasma temperature and electron density, the distribution of various transient ions and their velocities. The results show that the present radiation hydrodynamics model for a multi-element target reflects the dynamic evolution processes of their laser-produced plasmas, which make it an effective tool for plasma diagnostics.
对真空中激光产生的碳化硅等离子体中C VI、C V、Si VI和Si V离子的辐射和动力学特性进行了实验和理论研究。利用时空分辨激光产生等离子体光谱技术测量了碳化硅等离子体的极紫外发射光谱。为了探索此类等离子体中高电荷离子的动态演化，建立了一个扩展的辐射流体动力学模型。理论和实验时空演化光谱轮廓的比较给出了等离子体温度和电子密度的时间演化、各种瞬态离子的分布及其速度。结果表明，目前针对多元素靶的辐射流体动力学模型反映了其激光产生等离子体的动态演化过程，这使其成为等离子体诊断的有效工具。
