Antenna Design Method and Performance Improvement of a Micro Ion Engine Using Microwave Discharge
Antenna Design Method and Performance Improvement of a Micro Ion Engine Using Microwave Discharge
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DOI：
10.2322/tstj.7.pb_89
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
H. Koizumi;H. Kuninaka
中科院分区：
文献类型：
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作者：
H. Koizumi;H. Kuninaka
在这项研究中，我们提出了一种新型的小型化离子发动机系统µ1。最近将在那里安装的微型航天器和推进系统引起了人们的极大关注。要实现航天器部件的小型化，器件的多功能化是关键技术。我们提出的离子发动机分布在微型航天器上，为航天器提供了多种功能和强大的冗余性。为了实现这一概念，我们引入了一个离子发动机系统的新想法。也就是说，仅通过电连接将单个等离子体源同时用作离子束源和中和电子源。这种离子发动机系统不需要大量的中和剂。我们的概念需要一个由非常低功率的微波驱动的等离子体源。本文提出了一种利用微波放电的小型等离子体源天线的设计方法，并研制了一台小型化离子发动机。结果表明，在输入微波功率为1.0W、质量流量为0.15sccm时，小型化离子发动机的性能得到了提高，离子生产成本为240V，推进剂利用率为40%。
In this study, we are proposing a novel miniaturized ion engine system µ1. Recently microspacecraft and propulsion system to be installed there have attracted a lot of attentions. To accomplish the miniaturization of spacecraft component, multifunctionalization of devices are key technologies. The ion engine we are proposing here is distributed on microspacecraft and give a number of functions and strong redundancy to the spacecraft. To realize this concept, we introduced a novel idea for an ion engine system. That is to use single plasma source as both ion beam source and neutralizing electron source only by electrical connection. This ion engine system is released from the necessity of a number of neutralizers. Our concept requires a plasma source driven by very low power microwave. Here we proposed an antenna design method for a small plasma source using microwave discharge, and developed a miniaturized ion engine. As a result, the performance of the miniaturized ion engine was improved up to the ion production cost of 240 V and propellant utilization efficiency of 40 % at the input microwave power of 1.0 W and mass flow rate of 0.15 sccm.