Numerical Study of Magnetically Driven Isentropic Compression Experiments on PTS

作者：Zhang, Yang^*; Zhang, Zhaohui; Wang, Guilin; Ding, Ning; Xue, Chuang

来源：IEEE Transactions on Plasma Science, 2018, 46(10): 3478-3486.

DOI：10.1109/TPS.2018.2826563

• Isentropic compression experiment (ICE)
• magneto-hydrodynamic (MHD) simulation
• primary test stand (PTS) facility

The most powerful pulse power generator in China-primary test stand (PTS)-was used to get isentropic compression of aluminum to about 100 GPa. The high performance of synchronization system enables to trigger 24 modules according to a required timing sequence, which makes PTS a good platform for electromagnetically driven high energy density physics experiments. Two shots were used to establish the pulse-shaping capability and test the reliability of a numerical code. The first shot used a stripline load driven by a smooth rising current, while the second one was driven by a current with a weak start followed by a sharp rise. The current profiles, as well as the sample thicknesses, are optimized by a 1-D magneto-hydrodynamic code MADE1D, coupled with a full circuit model for PTS. The experimental setup, physical model, and simulation results are introduced. Comparing with the experimental results, simulated velocities at Al/LiF interface agree well with the measurement. It is shown that the shape of current pulse is one of the most important factors that impact the loading process.

• 出版日期2018-10
• 单位中国工程物理研究院; 北京应用物理与计算数学研究所; 中国工程物理研究院流体物理研究所