冲击压缩下稠密Ar等离子体温度测量  

TEMPERATURE MEASUREMENTS OF SHOCK INDUCED ARGON PLASMA

作　　者：陈敬平[1] 章冠人[1] 经福谦[1] 

机构地区：[1]中物院流体物理研究所

出　　处：《爆炸与冲击》1999年第3期204-209,共6页Explosion and Shock Waves

基　　金：中国工程物理研究院预研基金

摘　　要：测量了稠密氩等离子体温度，并与国外文献报道结果进行了对比。实验时通过对Ａｒ气冲击压缩产生稠密Ａｒ等离子体。Ａｒ样品的初始压力均为０．１ＭＰａ，初始温度为２９３Ｋ。五个实验点的压力为０．１２５～０．１６３ＧＰａ，温度为２３４００～２５９００Ｋ，等离子体非理想性参数Γ为０．４３～０．４５。给出了Ａｒ的Ｈｕｇｏｎｉｏｔ冲击压缩数据及温度实测数据。理论计算首次考虑了二级电离效应，温度理论计算值明显地偏高于实验值，这说明用Ｓａｈａ加上ＤｅｂｙｅＨ¨ｕｃｋｅｌ修正模型的计算电离度已与实际结果出现了差别，其电离能和能级布居也发生了改变。Hugoniot data and shock temperatures of the shock generated Ar plasma were measured in this work.Five shots have been done at pressures covering 0.125～0.163GPa and temperatures 2.34×10 4～2.59×10 4K.The non ideality coefficients of plasma Γ are 0.43～0.45.The initial pressure and temperature of Ar sample in all experiments are 0.1MPa and 293K respectively.Using ionization equalibrium model (Saha equation and Debye Hckel correction)and taking into account doubly ionizations as well as singly ionizations,we have calculated the equation of state,degree of ionization,and some other parameters of Ar plasma.In comprarison of the experimental with theoretical results,we find that the shock temperatures are lower than the theoretical.It implys that the theoretical degree of ionization should be lower than that of the experiments due to their lower values of T H,and thus the ionization energies and level populations of the compressed atoms are also changed.

关 键 词：冲击波 等离子体 电离度 温度测量 氩 冲击压缩 

分 类 号：O536[理学—等离子体物理]