The Applicability of Dual Stage Ion Optics to Ion Engines for High Power Missions
The Applicability of Dual Stage Ion Optics to Ion Engines for High Power Missions
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DOI：
10.1109/tps.2012.2185953
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发表时间：
2012-02
影响因子：
1.5
通讯作者：
M. Coletti;S. Gabriel
中科院分区：
文献类型：
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作者：
M. Coletti;S. Gabriel
在本文中，将评估双级离子光学，特别是所谓的双级离子发动机在高功率、高比冲任务中的适用性。首先，讨论了传统的两种栅格化离子发动机的性能极限，并报告了双级离子发动机的优点。对双级离子发动机的适用范围进行了解析分析，并对结果进行了数值验证。对三网格双级离子发动机(DS3G)的寿命和性能进行了数值研究，并与传统GIE进行了比较，首次在公开文献中评估了双级离子光学技术在什么条件下提供了比传统GIE更好的性能，以及它对推进器寿命的影响。与传统的栅极式离子发动机相比，双级离子发动机能够提供更高的推力密度和更长的寿命。
In this paper, the applicability of dual stage ion optics and in particular of the so-called dual stage ion engine to high power, high specific impulse missions will be evaluated. First, the performance limits of conventional two gridded ion engines (GIE) will be discussed and the advantages provided by dual stage ion engines reported. The limits of applicability of a dual stage ion engine will be analyzed analytically and the results confirmed numerically. The lifetime and performance of a three gridded dual stage ion engine (DS3G) will be numerically investigated and compared to those of a conventional GIE assessing for the first time in the open literature under what condition dual stage ion optics provide performance improvements over conventional GIEs and what is its impact on the thruster lifetime. Dual stage ion engines have been found to be capable of providing higher thrust density and longer lifetime with respect to conventional gridded ion engines.