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首页> 外文期刊>Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology >Doubly charged ion effect on life prediction accuracy of ion acceleration grid system
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Doubly charged ion effect on life prediction accuracy of ion acceleration grid system

机译：双电荷离子对离子加速网格系统寿命预测精度的影响

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摘要

Ion engines offer substantial weight savings but produce very little thrust. To meet mission requirements they must therefore be operational for extensive periods of time. Until now, all ion engines used in space missions have required expensive and time-consuming ground-based life qualification tests prior to flight. These tests can be shortened using the numerical simulation code "JIEDI" (JAXA Ion Engine Development Initiatives), which is now reaching the level of a practical engineering application. However, doubly charged ions are not fully modeled in JIEDI code. In the present study, the effect of doubly charged ions has been investigated to improve the life prediction accuracy of ion acceleration grid simulations. Findings show that the grid erosion increases with an increasing doubly charged ion fraction under the same propellant flow rate and the same beam current condition, which suggests that the doubly charged ion fraction is a crucial factor in life prediction accuracy
机译：离子发动机可大大减轻重量，但产生的推力很小。因此，为了满足任务要求，它们必须长时间运行。到目前为止，用于飞行任务的所有离子发动机在飞行前都需要进行昂贵且耗时的地面寿命鉴定测试。可以使用数字仿真代码“ JIEDI”（JAXA离子发动机开发计划）来缩短这些测试，现在该代码已达到实际工程应用的水平。但是，双电荷离子在JIEDI代码中并未完全建模。在本研究中，已经研究了双电荷离子的作用，以提高离子加速网格模拟的寿命预测精度。研究结果表明，在相同的推进剂流量和相同的束流条件下，网格腐蚀随着双电荷离子分数的增加而增加，这表明双电荷离子分数是寿命预测精度的关键因素

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