轻气炮低温靶的结构及液态CO2冲击压缩特性的研究

A Kind of Low Temperature Target System and Its Application in Shock Compression Studying of Liquid

1.
Laboratory for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics, Chengdu 610003, China;
2.
Institute of Applied Physics, Sichuan Union University, Chengdu 610065, China

摘要: 介绍了一种二级轻气炮的低温靶（温度可调范围为180～290 K）系统以及高纯度低温分子液体样品的制备技术。利用该项技术，我们在低温靶中成功地制备出了符合冲击实验要求的液态CO2样品，并在20~60 GPa区域获得7个冲击压缩数据点。经分析发现，液态CO2在30 GPa附近发生了冲击相变。
- 低温靶 /
- 液态CO2 /
- 冲击压缩特性
Abstract: This paper presents a kind of low temperature target system (temperature between 180～290 K) for the two-stage light gas gun and the technique for preparing molecular liquid samples of high purity at low temperatures. This technique was successfully used in preparing liquid CO2 samples. The shock compression results show that these samples totally meet the needs of shock wave experiments. We obtained seven shock-compression data points between 20～60 GPa. The results indicate that shock compressions induced a phase transition of liquid CO2 at 30 GPa.
- low temperature target /
- liquid CO2 sample /
- shock-compression