2020 Fiscal Year Final Research Report
Clarification of ion and neutral particle behavior in RF plasma thruster depending on the neutral particle supply position
| Project/Area Number |
19K14683
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 14010:Fundamental plasma-related
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| Research Institution | Chubu University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2021-03-31
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| Keywords | 電気推進機 / 高周波プラズマ / プラズマ工学 / レーザー誘起蛍光法 / マイクロ波干渉計 / 中性粒子 |
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| Outline of Final Research Achievements |
In order to improve the performance of Radio-frequency plasma thrusters, it is necessary to understand the behavior of plasma using the neutral fueling method, which has been reported to improve the thrust.
For this purpose, we have developed an experimental environment in which multiple measurements can be performed simultaneously, such as laser induced fluorescence (LIF), which can measure the velocity distribution function of ions and neutrals, and microwave interferometry, which can measure the electron density profile.
In the LIF method, the measurement sensitivity has been increased by a factor of about 10 compared to the conventional method, enabling spatial measurement by increasing the measurement speed. In the microwave measurement method, an inexpensive and easy-to-handle transmitter/receiver system has been developed, enabling simultaneous spatial measurement by multi-channel measurement.
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| Free Research Field |
プラズマ工学、電気推進機工学、マイクロ波工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は電気推進機の性能向上を大目的としているが、高周波プラズマに限らず多くのプラズマ応用研究においてプラズマを構成する粒子である電子、イオン、中性粒子の空間分布計測は極めて重要だが、イオン、特に中性粒子計測は困難であり、これらの計測を備えた装置は多くない。また、これらの計測器が一つの装置の一点を計測できるように整備されている例は、多くの計測器を備える大型核融合装置でも例がない。本研究ではこれらの計測器を一つの装置において、同一点で同時に計測でき、また空間分布計測が可能なものとして利用できる方法を研究したもので、他のプラズマ研究でも大いに役立つものと言える。
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