A simple method to verify the opacity and equation of state of high-Z plasmas

作者：Meng, Guangwei^*; Li, Jinghong; Yang, Jiamin; Zhu, Tuo; Zou, Shiyang; Wang, Min; Zhang, Weiyan

来源：Physics of Plasmas, 2013, 20(9): 092704.

DOI：10.1063/1.4821836

• X-RAY BURNTHROUGH
• RADIATION
• DRIVE
• AU
• TARGETS

Accurate opacity and equation of state (EOS) data are important parameters for reliable modeling and understanding many phenomena of high energy density physics. However, they are difficult to obtain either theoretically or experimentally especially for high-Z plasmas. In this paper, we proposed a simple method to verify the opacity and EOS of high-Z plasmas in rarefactive states, which is build on the two key aspects of ablation processes, i.e., the propagation of heatwave into materials and the hydrodynamic expansion of the blow-off plasmas. Based on the integrated analysis of the Au foil burnthrough and foam-confined plasma expansion experiments performed on the Shenguang II and Shenguang III prototype laser facilities, we suggested two semi-empirical multipliers to adjust the opacity and EOS of Au plasma. These adjusted opacity and EOS may then provide a foundation for other radiation hydrodynamic simulations under similar drive conditions.

• 出版日期2013-9
• 单位中国工程物理研究院; 中国工程物理研究院激光聚变研究中心; 北京应用物理与计算数学研究所