2021 Fiscal Year Final Research Report
High Thrust Density Operation by Electrostatic-Magnetic Hybrid Multi-Charged-Ion Acceleration
| Project/Area Number |
20K14950
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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 24010:Aerospace engineering-related
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2022-03-31
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| Keywords | 多価イオン / 推力密度 / 静電・電磁複合加速 |
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| Outline of Final Research Achievements |
In this study, we formed an annular divergent magnetic field using a nested solenoid coil, and mainly worked on the divergence half-angle control of the exhaust ion beam through the coil current ratio. The beam divergence half-width also showed the minimum value in a form consistent with the image of the exhaust plasma, and the divergence half-width could be reduced to 40 degrees under this operating condition. As the coil current ratio increased, the discharge voltage and the total ion beam current values also increased. In particular, as a result of multiplying the current ratio of the outer coil to the inner coil by 1.4 times, the total ion beam current value exceeded 1.0, which strongly suggested the generation of multi-charged ions.
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| Free Research Field |
電気推進機
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| Academic Significance and Societal Importance of the Research Achievements |
従来の静電加速型電気推進機には，多価イオン生成時に生じる自由電子を活用した推力発生機構が存在しない．そのため，電子電流の増分は推力効率低下の要因であり多価イオンの生成を抑制する手法がとられてきた．本研究のキーワードは静電・電磁複合加速である．Coulomb衝突を介した電子-イオン間の運動量輸送機構を組み込むことで電磁加速が可能となり，これと静電加速とを組み合わせることで，推力効率を維持しつつ推力密度そのものを向上させる点が従来と異なるアプローチである．これにより電気推進機の単機運転における大推力作動を実現し，軌道遷移時間の短縮につなげる．
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