高溫等離子體的狀態(tài)方程及其熱力學(xué)性質(zhì)
[Abstract]:The equation of state of plasma at high temperature and its thermodynamic properties are widely used in the fields of astrophysics, controllable nuclear fusion, weapon design and damage effect. In this paper, the theoretical models and treatment methods of the state equations of high temperature plasma in different state regions are reviewed. For ideal plasma, the interaction between ions can be neglected, and the equation of state is simple and perfect. At ultra-high temperature, the atom is completely ionized, the ions and electrons can be described by the ideal gas equation of state; when the temperature is not too high, the ion partial ionization can be described by the Saha equation and its modified model; the atom can be described in the highly compressed state. The equation of state can be obtained by using Thomas-Fermi model and its improved model. For non-ideal plasma, there is a strong coupling between ions, and there is no single theoretical model to describe the interaction between ions in any range of density and temperature. In principle, the quantum molecular dynamics method can give reliable results in large temperature density range, but it is difficult to be applied to dense plasma region with high temperature due to the complexity of calculation and the convergence of calculation at high temperature. Although the semi-empirical classical molecular dynamics method is simple and computational, it can only give more accurate results of the equation of state in a certain range. It is a simple and effective method to obtain the global equation of state by using different calculation models in different temperature density regions and then interpolating in the blank area.
【作者單位】: 國(guó)防科學(xué)技術(shù)大學(xué)理學(xué)院;
【分類號(hào)】:O53
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