氙离子推力器束流分布特性研究

建立了离子推力器束流分布的高斯模型,以200mm氙离子推力器为例,在不同工作环境下对推力器束流分布进行了数值模拟,并通过试验测量了推力器引出切面不同位置(轴向z=50mm,z=100mm)下的径向束电流密度和束离子密度分布。通过对数值模拟结果与试验测量结果的比较,误差为17%,认为数值模拟结果与试验测量结果吻合较好。表明离子推力器引出束流呈轴对称分布,在推力器出口附近,束离子密度很大,越往下游,密度越小且束流出现发散。

Research of xenon ion thrusters beam current distribution characteristic

In this paper,the gauss model of the ion thruster beam current distribution was set up.The beam current distribution numerical simulation was performed by this model at different work conditions of 200mm xenon ion thruster.The beam current density and the ion density radial distribution were measured at different position(z=50mm,z=100mm)of the ion thruster exit in the thruster tests.The comparison between the simulation results and experimental data displaces good agreement.The error is 17%.The test results also reveal the axial symmetzical distribution of the exit ion beam current.High ion density is located around the thruster exit.At the downstream,the ion density decteases and the beam becomes divergence.