60kV-55A-2s离子源电极栅的热应力计算与分析

Analysis of thermal stress for a grid of 60kV-55A-2s ion source

利用有限元单元法对60kV-55A-2s离子源地电极栅进行了热应力分析。在热载荷为1.0MW.m-2、冷却水流速为5m.s-1时,通过瞬态温度场计算得到了地电极栅达到热平衡时间为6s、2s时的最高温度低于100℃的结果。热应力场分析结果显示,电极的热变形属于二维翘曲;在载荷密度低于2.0MW.m-2时,电极栅可以保持在弹性变形范围内。

Analysis of thermal stress for a grid of ion source with 60kV, 55A and 2s is carried out using finite element method. Numerical simulation for transient temperature indicates that it takes 6s to make thermal balance, and the maximum temperature is less than 100℃ at 2s. The results indicate no melt and no plastic deformation on the grid under a heat loads of 2.0MW·m^-2 with cooling water velocity of 10m·s^-1. The most dangerous point and the maximum displacement of the grid are also shown in the paper.