二维无碰撞离子引出过程的数值模拟

利用流体理论电子平衡模型，对二维不考虑带电粒子碰撞的激光分离同位素（ＡＶＬＩＳ）离子引出过程进行了数值模拟，包括对不同收集方式进行了模拟和对比，研究了离子引出过程中的物理机理及物理量的空间分布特点，表明等离子体电位略高于阳极电位，并在离子引出过程中基本保持不变；电子温度越高等离子体电位越高，离子引出时间越短；对称收集方式的离子引出时间短且离子逃逸量也少。

Two-dimensional numerical simulation of collisionless ion collection

The two-dimensional numerical simulation of collisionless ion collection using fluid theory and electron-equilibrium model for atomic vapor laser isotopic separation (AVLIS) is described. The collection scheme and construction of collector were simulated and compared. The physical mechanism and the distribution characteristics of physical variables in ion collection process were studied. The conclusions are: the plasma potential is slightly higher than anode, and it is almost constant during ion collection. The higher the electron temperature, the higher the plasma potential, and the shorter the ion collection time. Ion collection time is shorter and the number of escaped ions is less with the symmetry collection.