液态气体冲击压缩实验技术

 利用液氮制冷技术实现低温靶及气体样品液化，并通过二级轻气炮加载进行液态气体0～60 GPa的冲击压缩实验。较详细地讨论了制冷系统与样品靶、靶室内外各环节之间可靠的低温真空连接等工程问题，样品靶的温度调节与控制，液态气体样品的灌注及液体量（或液面） 的判断依据，样品压缩后的冲击波速度测量和电导率测量等技术问题。

THE EXPERIMENTAL TECHNOLOGY FOR SHOCK-COMPRESSED LIQUID GAS

The technology of shock-compression of liquid gas is reported in this paper. The liquid sample, which is refrigerated by liquid nitrogen, were shocked from initial states at 0.807 g/cm³ and 0.808 g/cm³ for CO and N₂, respectively, to pressure range of 10～57 GPa using a two-stage light-gas gun. The shock velocity vs mass velocity for liquid nitrogen and liquid carbon monoxide were measured, and electrical conductivity for liquid nitrogen were measured too. The engineering problems about how to combine the cryogenic system with the sample target, the inner target-chamber and its outer, the cryogenic-target and measuring-detectors et al, are discussed. In addition, the problems of measuring and controlling of the temperature of cryogenic-target, and hw to determine the liquid is or not full filled in the sample cavity are also discussed.