摘要
水中放电等离子体通道内温度达 2× 10 4 ～ 5× 10 4 K、而压力达 1～ 10GPa。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 =10 2 9m- 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 =10 2 9m- 3、T≈ 2× 10 4 K时 ,原子内部能级的扰动使总压增大约 30 %。
The temperature of plasma produced by pulse discharge in water (PPDW) is about 2×10 4K to 5×10 4K,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 O 2+ is about 10 29 m -3 ,the electron density, n e 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 =10 29 m -3 and T≈ 2×10 4K,the pressure goes up by about 30% for the perturbation of atom energy level.
出处
《高压物理学报》
CAS
CSCD
北大核心
2001年第2期103-110,共8页
Chinese Journal of High Pressure Physics
