Neutralization Performance with Two Field Emission Cathodes in an Ion Engine

• Kinoshita Jumpei

  九州大学大学院総合理工学府先端エネルギー理工学専攻

• Shiraki Ryo

  九州大学工学部エネルギー科学科

• Yamamoto Naoji

  連絡先著者（Corresponding author）：[e-mail] 九州大学大学院総合理工学研究院エネルギー科学部門

• Nakano Masakatsu

  東京都立産業技術高等専門学校ものづくり工学科

• Ohkawa Yasushi

  国立研究開発法人宇宙航空研究開発機構研究開発部門

• Funaki Ikkoh

  国立研究開発法人宇宙航空研究開発機構宇宙科学研究所

Bibliographic Information

Other Title

• イオンエンジンにおける複数台の電界放出型電子が中和性能に及ぼす影響

Abstract

In order to improve ion engine's performance, the neutralization performance with two field emission cathodes in an ion engine is investigated. The neutralization performance is evaluated by the potential difference between cathode and ground, using a 100μN class ion thruster developed at Kyushu University and two 50×50mm² field emission cathodes with carbon nanotube emitter. The potential difference between cathode and ground is not only determined by cathode electron supply capacity and the position of the cathodes but also foot print of the neutralizers, it would be due to the space charge limitation. That is, the potential difference between cathode and ground is improved with increase in total emission current, and that with a single field emission cathode at emission current of 6mA is -20V, on the contrary, that with two field emission cathodes is -12V.

Journal

• JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

  JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 69 (5), 215-218, 2021

  THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

Keywords

• Ion Engine
• Field Emission Cathode
• Neutralizer
• Cathode Floating Potential
• Electric Propulsion

Details

• CRID: 1390008156667538176
• NII Article ID: 130008101377
• DOI: 10.2322/jjsass.69.215
• ISSN: 24323691
• ISSN: 13446460
• Web Site: https://www.jstage.jst.go.jp/article/jjsass/69/5/69_69_215/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed