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为了解决LIPS-200E离子推力器工作过程中加速栅截获电流较大的问题,本文针对该推力器栅极组件建立了二维数值仿真计算模型,采用仿真计算和理论分析相结合的方法,系统分析了栅极组件几何结构参数和工作电参数对其束流离子聚焦状态的影响。分析结果显示,相比其他结构及电参数,栅间距是影响束流离子聚焦和加速栅截获电流的最关键影响因素,当栅间距为0.06 mm时,栅极组件能很好地引出束流,无任何离子被加速栅所截获。分析结果和实测结果符合一致。
In order to solve the large acceleration current intercepting current during the operation of LIPS-200E ion thruster, a two-dimensional numerical simulation calculation model is established for the thruster grid components. The simulation analysis and theoretical analysis are combined to analyze the system. The influence of grid structure geometry parameters and working electrical parameters on ion beam focusing state is discussed. The results show that compared with other structures and electrical parameters, the gate spacing is the most important factor affecting beam ion focusing and accelerating the gate intercepting current. When the gate spacing is 0.06 mm, the gate component can lead out the beam well, No ions are intercepted by the acceleration gate. Analysis results and the measured results in line.