Abstract A microwave diagnostics method and radio interferometers with wavelengths of 3.2 and 2.1 mm are used to study the kinematic and electrophysical characteristics of shock-compressed argon plasma, which is initially at atmospheric pressure. This research study is carried out at pressures of 12–56 MPa, shock wave velocities of 3.1–6.2 km/s, temperatures 9000–19 000 K, and densities 0.006–0.012 g/cm 3 for powers of Coulomb nonideality from 10 −4 to 0.2. The data obtained on the shock-wave compressibility of argon are consistent with the known measurement results and calculations using the modified van der Waals model and the chemical plasma model. A set of values of the reflection coefficient of electromagnetic radiation from the shock wave front at wavelengths of 3.2 and 2.1 mm is obtained, which serves as a basis for estimating the conductivity and electron concentration behind the shock wave front. The experimental data are consistent with calculation results in a wave velocity range of 3.1–3.6 km/s. It is established that with a further increase in the velocity has no effect on the reflection coefficient.

中文翻译：

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使用微波诊断冲击压缩氩等离子体的研究

摘要 利用微波诊断方法和波长为 3.2 和 2.1 mm 的无线电干涉仪，研究了初始处于大气压的激波压缩氩等离子体的运动学和电物理特性。本研究是在 12–56 MPa 的压力、3.1–6.2 km/s 的冲击波速度、9000–19 000 K 的温度和 0.006–0.012 g/cm 3 的密度下进行的，库仑非理想的幂为 10 -4到 0.2。氩气冲击波压缩率的数据与已知的测量结果和使用修正范德华模型和化学等离子体模型的计算结果一致。得到一组波长为 3.2 和 2.1 mm 的冲击波前电磁辐射的反射系数值，它作为估计冲击波前背后的电导率和电子浓度的基础。实验数据与3.1～3.6km/s波速范围内的计算结果一致。已经确定，随着速度的进一步增加，对反射系数没有影响。