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Elucidation of the electrospray phenomena between microelectrodes for versatile use in ultra-small space propulsion devices

Research Project

Project/Area Number 21H01530
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 24010:Aerospace engineering-related
Research InstitutionYokohama National University

Principal Investigator

Takao Yoshinori  横浜国立大学, 大学院工学研究院, 准教授 (80552661)

Co-Investigator(Kenkyū-buntansha) 土屋 智由  京都大学, 工学研究科, 教授 (60378792)
長尾 昌善  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究グループ長 (80357607)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2021: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywordsエレクトロスプレー / イオン液体 / イオンビーム / 電気推進 / 超小型衛星 / 電界放出 / 推力可変
Outline of Research at the Start

用途に応じて推力レベルが可変となる超小型宇宙推進機としてエレクトロスプレー推進機があるが、推力密度が小さく、かつ、イオンビームがバラつく不安定性の課題がある。この克服には、高速なイオンを排出するエミッタ電極の高密度実装と、その状況におけるエレクトロスプレー現象の解明にある。本研究では1-100μmの2桁にもわたる微小電極間エレクトロスプレー現象の学術基盤を構築し、高密度実装下においても安定したビーム引き出し条件を同定する。

Outline of Final Research Achievements

Electrospray thrusters are a candidate for a very small space propulsion system with variable thrust levels depending on the application. In this study, to establish the fundamental physics for the electrospray phenomenon between microelectrodes, emitters with scales varying from 1 to 100 micrometers were fabricated, and ion beam characteristics were evaluated. Reducing the scale resulted in high current density, and conditions were identified in which most ion species constituting the ion beam were monomers.

Academic Significance and Societal Importance of the Research Achievements

エレクトロスプレー推進機に利用される電極構造の従来スケールは100 μm以上の領域であり、本研究において初めて10 μm以下を含めた2桁にわたるスケールでのエレクトロスプレー現象を実現できた。多様なエレクトロスプレーイオン源の創出は、用途に応じて推進機を選定可能な自由度を与えることになり、今後の超小型衛星の活躍の場を広げることに貢献することが期待できる。

Report

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

    (51 results)

All 2024 2023 2022 2021 Other

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (40 results) (of which Int'l Joint Research: 15 results,  Invited: 2 results) Remarks (3 results)

  • [Journal Article] Fabrication of a Double-Emitter Structure for Higher Current Density of Ionic Liquid Electrospray Thrusters2024

    • Author(s)
      Shujun GUO, Masayoshi NAGAO, Katsuhisa MURAKAMI, Hiromasa MURATA, and Yoshinori TAKAO
    • Journal Title

      Journal of Evolving Space Activities

      Volume: 2 Issue: 0 Pages: n/a

    • DOI

      10.57350/jesa.142

    • ISSN
      2758-1802
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of Grooved Needle Emitter Performance for Ionic Liquid Electrospray Thrusters2024

    • Author(s)
      Koki MATSUKAWA and Yoshinori TAKAO
    • Journal Title

      Journal of Evolving Space Activities

      Volume: 2 Issue: 0 Pages: n/a

    • DOI

      10.57350/jesa.149

    • ISSN
      2758-1802
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Time-of-Flight Measurements of Ion Beam Compositions in Electrospray Thrusters2024

    • Author(s)
      Momoko NAEMURA and Yoshinori TAKAO
    • Journal Title

      Journal of Evolving Space Activities

      Volume: 2 Issue: 0 Pages: n/a

    • DOI

      10.57350/jesa.146

    • ISSN
      2758-1802
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Emission measurements and in-situ observation of ionic liquid electrospray thrusters with longitudinally grooved emitters2023

    • Author(s)
      Matsukawa Koki、Nakashima Yuiko、Naemura Momoko、Takao Yoshinori
    • Journal Title

      Journal of Electric Propulsion

      Volume: 2 Issue: 1

    • DOI

      10.1007/s44205-023-00057-8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fabrication and Demonstration of SU-8 Based Emitter Arrays for Ionic Liquid Electrospray Thrusters2023

    • Author(s)
      Takumi SHINGU, Masayoshi NAGAO, Katsuhisa MURAKAMI, Hiromasa MURATA, Sommawan KHUMPUANG, Shiro HARA, Yoshinori TAKAO
    • Journal Title

      Journal of Evolving Space Activities

      Volume: 1 Issue: 0 Pages: n/a

    • DOI

      10.57350/jesa.30

    • ISSN
      2758-1802
    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Design and Fabrication of Ionic Liquid Electrospray Thruster with Two-Stage Electrodes2023

    • Author(s)
      Akane NISHIMURA, Hirohide KATSUTA, Yoshinori TAKAO, Toshiyuki TSUCHIYA
    • Journal Title

      Journal of Evolving Space Activities

      Volume: 1 Issue: 0 Pages: n/a

    • DOI

      10.57350/jesa.7

    • ISSN
      2758-1802
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular Dynamics Simulations of Ion Extraction from Nanodroplets for Ionic Liquid Electrospray Thrusters2022

    • Author(s)
      Takaaki Enomoto, Shehan M. Parmar, Ryohei Yamada, Richard E. Wirz, Yoshinori Takao
    • Journal Title

      Journal of Electric Propulsion

      Volume: 1 Issue: 1

    • DOI

      10.1007/s44205-022-00010-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Microthrusters indispensable for nano/microsatellites that will lead the next-generation space industry2021

    • Author(s)
      鷹尾 祥典
    • Journal Title

      Oyo Buturi

      Volume: 90 Issue: 5 Pages: 298-302

    • DOI

      10.11470/oubutsu.90.5_298

    • NAID

      130008034658

    • ISSN
      0369-8009, 2188-2290
    • Year and Date
      2021-05-05
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Effects of Tip Curvature on Multiple Emitted Ion Beams in Porous Ionic Liquid Electrospray Thrusters2024

    • Author(s)
      Koki Takagi, Ryudo Tsukizaki, Yusuke Yamashita, and Yoshinori Takao
    • Organizer
      2024 AIAA Science and Technology Forum and Exposition (AIAA Scitech Forum)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ポーラス型エレクトロスプレースラスタのエミッタ先端曲率半径がイオン放出に与える影響2024

    • Author(s)
      髙木公貴, 月崎竜童, 鷹尾祥典
    • Organizer
      令和5年度 宇宙輸送シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] エレクトロスプレースラスタのための逆電位アナライザ計測系の構築2024

    • Author(s)
      中島惟子, 鷹尾祥典
    • Organizer
      令和5年度 宇宙輸送シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] エレクトロスプレースラスタにおける溝付きエミッタ形状の改善およびイオンビーム特性評価2024

    • Author(s)
      松川晃己, 鷹尾祥典
    • Organizer
      令和5年度 宇宙輸送シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] FEA作製技術を用いたエレクトロスプレーイオン源の開発2024

    • Author(s)
      郭樹俊, 長尾昌善, 村上勝久, 村田博雅, 鷹尾祥典
    • Organizer
      2024年電子情報通信学会総合大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] イオン液体エレクトロスプレースラスタにおける多孔質エミッタ針からのマルチサイトイオン放出2024

    • Author(s)
      髙木公貴, 月崎竜童, 鷹尾祥典
    • Organizer
      第63回航空原動機・宇宙推進講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] エレクトロスプレースラスタを対象としたイオンビーム診断と推進性能評価2024

    • Author(s)
      鷹尾祥典, 青木里奈, 苗村桃子, 中島惟子
    • Organizer
      第63回航空原動機・宇宙推進講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Ionic Liquid Electrospray Ion Sources for Space Propulsion2023

    • Author(s)
      Yoshinori Takao
    • Organizer
      The 243rd ECS Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Performance Evaluation and Modelling of Ion Extraction for Porous Electrospray Thrusters2023

    • Author(s)
      Koki Takagi, Ryudo Tsukizaki, Yusuke Yamashita, and Yoshinori Takao
    • Organizer
      34th International Symposium on Space Technology and Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Time-of-Flight Measurements of Ion Beam Compositions in Electrospray Thrusters2023

    • Author(s)
      Momoko Naemura and Yoshinori Takao
    • Organizer
      34th International Symposium on Space Technology and Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improvement of Grooved Needle Emitter Performance for Ionic Liquid Electrospray Thrusters2023

    • Author(s)
      Koki Matsukawa and Yoshinori Takao
    • Organizer
      34th International Symposium on Space Technology and Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ionic Liquid Electrospray Thrusters with a Double-Emitter Structure for High Current Density2023

    • Author(s)
      Shujun Guo, Masayoshi Nagao, Katsuhisa Murakami, Hiromasa Murata, and Yoshinori Takao
    • Organizer
      34th International Symposium on Space Technology and Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] エレクトロスプレースラスタの直接推力測定2023

    • Author(s)
      青木里奈, 鷹尾祥典
    • Organizer
      日本航空宇宙学会 第54期定時社員総会および年会講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] エレクトロスプレースラスタを対象とした飛行時間型質量分析系の精度評価2023

    • Author(s)
      苗村桃子, 鷹尾祥典
    • Organizer
      日本航空宇宙学会 第54期定時社員総会および年会講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] エレクトロスプレースラスタを対象とした飛行時間型質量分析の計測系依存性2023

    • Author(s)
      苗村桃子, 鷹尾祥典
    • Organizer
      第67回宇宙科学技術連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 逆電位アナライザを用いたエレクトロスプレースラスタのイオンビーム特性評価2023

    • Author(s)
      中島惟子, 鷹尾祥典
    • Organizer
      第67回宇宙科学技術連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] エレクトロスプレースラスタを対象とした直接推力測定系の構築2023

    • Author(s)
      青木里奈, 鷹尾祥典
    • Organizer
      第67回宇宙科学技術連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ポーラス型エレクトロスプレースラスタのエミッタ形状がイオン放出に与える影響2023

    • Author(s)
      髙木公貴,月崎竜童, 鷹尾祥典
    • Organizer
      第67回宇宙科学技術連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] キャピラリ・ニードルエミッタ構造を有するエレクトロスプレーイオン源の性能向上に向けた作製プロセスの最適化2023

    • Author(s)
      郭樹俊, 長尾昌善, 村上勝久, 村田博雅, 鷹尾祥典
    • Organizer
      電子デバイス研究会「電子・イオンビーム応用」
    • Related Report
      2023 Annual Research Report
  • [Presentation] 多孔質エレクトロスプレースラスタにおけるイオン引き出しのモデリング2023

    • Author(s)
      髙木公貴, 月崎竜童, 西山和孝, 山下裕介, 鷹尾祥典
    • Organizer
      令和4年度 宇宙輸送シンポジウム, 宇宙科学研究所, 相模原市
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高電圧作動可能な高実装密度エレクトロスプレースラスタ2023

    • Author(s)
      新宮拓実, 長尾昌善, 村上勝久, 村田博雅, 鷹尾祥典
    • Organizer
      令和4年度 宇宙輸送シンポジウム, 宇宙科学研究所, 相模原市
    • Related Report
      2022 Annual Research Report
  • [Presentation] 溝付きエミッタ構造を持つエレクトロスプレースラスタのイオンビーム特性評価2023

    • Author(s)
      松川晃己, 鷹尾祥典
    • Organizer
      令和4年度 宇宙輸送シンポジウム, 宇宙科学研究所, 相模原市
    • Related Report
      2022 Annual Research Report
  • [Presentation] Ionic Liquid Electrospray Thrusters with Different Types of Emitter Structures2023

    • Author(s)
      Yoshinori Takao, Masayoshi Nagao, Toshiyuki Tsuchiya, and Ryudo Tsukizaki
    • Organizer
      11th Asian Joint Conference on Propulsion and Power, Kanazawashi Cultural Hall, Kanazawa, Japan
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] IONIC LIQUID ELECTROSPRAY THRUSTER WITH TWO-STAGE ELECTRODES ON GLASS SUBSTRATE2023

    • Author(s)
      Akane Nishimura, Toshiyuki Tsuchiya, and Yoshinori Takao
    • Organizer
      36th IEEE International Conference on Micro Electro Mechanical Systems, Science Congress Center Munich, Germany
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication and Characterization of an Ionic Liquid Electrospray Thruster using SU-8 Thick-Film Photoresist2022

    • Author(s)
      Takumi Shingu, Masayoshi Nagao, Katsuhisa Murakami, Hiromasa Murata, and Yoshinori Takao
    • Organizer
      37th International Electric Propulsion Conference, Massachusetts Institute of Technology, Boston, MA, USA
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication and Performance Characterization of an Ionic Liquid Electrospray Thruster with a Grooved Needle Emitter Shape2022

    • Author(s)
      Koki Matsukawa, Hirohide Katsuta, Yuiko Nakashima, Akane Nishimura, Toshiyuki Tsuchiya, and Yoshinori Takao
    • Organizer
      37th International Electric Propulsion Conference, Massachusetts Institute of Technology, Boston, MA, USA
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-Current-Density Ionic Liquid Electrospray Thruster with a Nano-Capillary Emitter Array2022

    • Author(s)
      Yoshinori Takao, Kanta Suzuki, Shujun Guo, Masayoshi Nagao, Katsuhisa Murakami, and Hiromasa Murata
    • Organizer
      37th International Electric Propulsion Conference, Massachusetts Institute of Technology, Boston, MA, USA
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ionic Liquid Electrospray Ion Sources using SU-8 Photoresist for Microspacecraft Propulsion2022

    • Author(s)
      Takumi Shingu, Masayoshi Nagao, Katsuhisa Murakami, Hiromasa Murata, and Yoshinori Takao
    • Organizer
      22nd International Vacuum Congress, Sapporo Convention Center, Sapporo, Japan
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ionic Liquid Electrospray Ion Sources with Grooved Needle Emitters for Precise Thrust Control2022

    • Author(s)
      Koki Matsukawa, Hirohide Katsuta, Yuiko Nakashima, and Yoshinori Takao
    • Organizer
      22nd International Vacuum Congress, Sapporo Convention Center, Sapporo, Japan
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超高実装密度エレクトロスプレースラスタのための二重エミッタ構造の試作2022

    • Author(s)
      郭樹俊,長尾昌善, 村上勝久, 村田博雅, 鷹尾祥典
    • Organizer
      第66回宇宙科学技術連合講演会, 熊本城ホール, 熊本市
    • Related Report
      2022 Annual Research Report
  • [Presentation] 溝付きエミッタ構造を持つエレクトロスプレースラスタの作製とイオンビーム特性評価2022

    • Author(s)
      松川晃己, 鷹尾祥典
    • Organizer
      第66回宇宙科学技術連合講演会, 熊本城ホール, 熊本市
    • Related Report
      2022 Annual Research Report
  • [Presentation] イオン液体を推進剤とした電気推進機2022

    • Author(s)
      鷹尾祥典
    • Organizer
      第66回宇宙科学技術連合講演会, 熊本城ホール, 熊本市
    • Related Report
      2022 Annual Research Report
  • [Presentation] 超小型衛星のための厚膜レジストSU-8を用いたエレクトロスプレーイオン源2022

    • Author(s)
      新宮拓実, 長尾昌善, 村上勝久, 村田博雅, 鷹尾祥典
    • Organizer
      電子デバイス研究会「電子・イオンビーム応用」、名古屋大学東山キャンパスおよびウインク愛知、名古屋市
    • Related Report
      2022 Annual Research Report
  • [Presentation] 超高実装密度エレクトロスプレーイオン源のための二重エミッタ構造の試作2022

    • Author(s)
      郭樹俊, 長尾昌善, 村上勝久, 村田博雅, 鷹尾祥典
    • Organizer
      電子デバイス研究会「電子・イオンビーム応用」、名古屋大学東山キャンパスおよびウインク愛知、名古屋市
    • Related Report
      2022 Annual Research Report
  • [Presentation] 飛行時間型質量分析によるエレクトロスプレースラスタのイオンビーム特性評価2022

    • Author(s)
      勝田 紘英, 松川 晃己, 中島 惟子, 鷹尾 祥典
    • Organizer
      令和3年度 宇宙輸送シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fabrication of SU-8 Based Emitter Arrays for Ionic Liquid Electrospray Thrusters2022

    • Author(s)
      Takumi Shingu, Masayoshi Nagao, Katsuhisa Murakami, Hiromasa Murata, Sommawan Khumpuang, Shiro Hara, and Yoshinori Takao
    • Organizer
      33rd International Symposium on Space Technology and Science
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and Fabrication of Ionic Liquid Electrospray Thruster with Two-Stage Electrodes2022

    • Author(s)
      Akane Nishimura, Yoshinori Takao, and Toshiyuki Tsuchiya
    • Organizer
      33rd International Symposium on Space Technology and Science
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 溝付きエミッタ構造を持つエレクトロスプレースラスタの作製2022

    • Author(s)
      松川 晃己, 勝田 紘英, 中島 惟子, 鷹尾 祥典
    • Organizer
      第61回航空原動機・宇宙推進講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 厚膜レジストSU-8を用いたエレクトロスプレースラスタの試作2021

    • Author(s)
      新宮 拓実, 長尾 昌善, 村上 勝久, 村田 博雅, クンプアン ソマワン, 原 史朗, 鷹尾 祥典
    • Organizer
      第65回宇宙科学技術連合講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] イオン液体エレクトロスプレースラスタのための二段電極構造の作製2021

    • Author(s)
      西邑 亜香音, 鷹尾 祥典, 土屋 智由
    • Organizer
      第38回「センサ・マイクロマシンと応用システム」シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Remarks] Plasma, Space Propulsion Laboratory

    • URL

      http://www.takao-lab.ynu.ac.jp/

    • Related Report
      2023 Annual Research Report
  • [Remarks]

    • URL

      http://www.takao-lab.ynu.ac.jp/research.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] Takao Lab

    • URL

      http://www.takao-lab.ynu.ac.jp/

    • Related Report
      2021 Annual Research Report

URL: 

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

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