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Narrow region plasma measurement method and application to miniature RF plasma thrusters.

Research Project

Project/Area Number 21K04485
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 24010:Aerospace engineering-related
Research InstitutionRyukoku University

Principal Investigator

Oshio Yuya  龍谷大学, 先端理工学部, 助教 (80711233)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords電気推進 / プラズマ計測 / 超小型衛星 / 光学計測 / 高周波プラズマ
Outline of Research at the Start

超小型人工衛星はそのサイズと発電能力から推進機の搭載例は少なく適した超小型推進機の開発が要求されている.その1つとして超小型プラズマ推進システムの研究開発が進められている。このようなプラズマ推進には推進機内外のプラズマ状態の把握が不可欠であるものの,超小型推進では数mm程度の狭領域でのプラズマ現象であるためにその計測が困難である.本研究では,光学的計測手法による,狭領域のプラズマの空間的特性手法を開発する.その上で,超小型プラズマ推進の1種である超小型RF(Radio Frequency)プラズマスラスタに適応することで,狭領域でのプラズマ生成・加速特性を明らかにすることを目指す.

Outline of Final Research Achievements

Miniature plasma thrusters have been developed as propulsion systems for miniature satellites. The one of the issue of them has been to measure the plasma characteristics in a narrow region, which can be several millimetres in size. In this study, an optical measurement system was developed for an miniature RF plasma thruster of 3.4 mm diameter to measure the plasma distribution by measuring the emission line brightness distribution in narrow plasma regions for understanding the plasma characteristics in narrow regions. The relative electron number density and neutral number density distribution of a 10 mm x 10 mm region with a spatial resolution of 0.026 mm was successfully measured for the first time. In addition, the plasma phenomena in the discharge tube peculior to the narrow region were observed and the effects on the length and diameter of the discharge tube were revealed. From these results provided knowledge for the optimisation of miniature plasma thrusters.

Academic Significance and Societal Importance of the Research Achievements

超小型衛星の打ち上げ数は年々増加しており、それに伴い超小型スラスタへの要求も高まっている。特にプラズマスラスタの性能向上は超小型衛星ミッションの高度化に重要である。超小型プラズマスラスタの対象となる狭領域のプラズマ現象は計測の難しさから未だ未解明な部分が多い。本研究の成果であり、狭領域のプラズマ計測手法を応用することで、狭領域のプラズマ現象の解明、それに伴う超小型プラズマスラスタの性能向上へつながることが期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (4 results)

All 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Plasma Distribution Measurement of a Miniature RF Plasma Thruster by Narrow-band Imaging2023

    • Author(s)
      Yuya OSHIO, Rin HIWATASHI, Hiroyuki NISHIDA, Hirotaka OTSU
    • Journal Title

      Journal of Evolving Space Activities

      Volume: -

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 超小型RFプラズマスラスタの放電管内外のプラズマ特性2022

    • Author(s)
      大塩裕哉,清岡優翔, 大津広敬
    • Organizer
      第66回宇宙科学技術連合講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Plasma Distribution Measurement of Miniature RF Plasma Thruster2022

    • Author(s)
      Yuya OSHIO,Rin HIWATASHI,Hiroyuki NISHIDA and Hirotaka OTSU
    • Organizer
      33rd International Symposium on Space Technology and Science
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 超小型 RFプラズマスラスタの動作特性に関する研究2021

    • Author(s)
      大塩 裕哉 吉田 翔一 樋渡 倫
    • Organizer
      第62回宇宙科学技術連合講演会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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