水中放电等离子体状态方程的理论研究

 水中放电等离子体通道内温度达2×10⁴～5×10⁴ K、而压力达1～10 GPa。在这样的参数下，等离子体的状态方程已不能用理想气体状态方程来描述。首次考虑了粒子间的相互作用对水中放电等离子体参数下粒子电离能的影响，计算了电子的简并性、带电粒子间的库仑相互作用、原子内部能级扰动所产生的压力。计算结果表明：当H、O原子和离子的总密度n=10²⁹ m^-3时，若考虑电离能漂移，则电子密度提高的最大幅度达70%；电子的简并性对压力的影响很小；粒子间的库仑相互作用在高温区使总压减小较显著，但在所计算的参数范围内，其幅值也不大于10%；当n=10²⁹ m^-3、T≈2×10⁴ K时，原子内部能级的扰动使总压增大约30%。

THE STATE EQUATIONS OF PLASMA PRODUCED BY PULSE DISCHARGE IN WATER

The temperature of plasma produced by pulse discharge in water (PPDW) is about 2×104K to 5×104K,and the max. pressure of PPDW reaches 1～10GPa.So the PPDW should not be treated as an ideal gas.In this work,the corrections to the ionization potentials in an equilibrium equation of PPDW,and the pressure from the degeneracy of electrons,the effect among charged particles and perturbations of energy eigenvalue of atoms were calculated.The calculation results show that:① When the total density n of H,O,H+,O+ and O2+ is about 1029m-3,the electron density,ne increases byabout 70% considering the correction of ionization potential;② The degeneracy of electrons has little effects on the pressure of PPDW;③ The effects among charged particles makes the pressure of PPDW decreased at higher temperature,by no more than 10%;④ When n=1029m-3 and T≈2×104K,the pressure goes up by about 30% for the perturbation of atom energy level.