Deep Space Flight of Microwave Discharge Ion Engines onboard Hayabusa

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概要

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• The microwave discharge ion engine "μ10" has a long life and high reliability because of electrodeless plasma generation in both the ion generator and the neutralizer. A single μ10 generates a thrust of 8 mN, specific impulse of 3,200 seconds, and consuming 350 W of electric power. Four μ10s propelled the "Hayabusa" asteroid explorer, launched on May 2003, combining a new orbit change scheme "Delta-V Earth Gravity Assist". In 2005, Hayabusa, using solar electric propulsion, managed to successfully cover the distance between 0.86 AU and 1.7 AU from Sun in the solar system, as well as rendezvous with, land on, and lift off from the asteroid Itokawa. During the 2-year flight, the ion engine system generated a delta-V of 1,400 m/s while consuming 22 kg of xenon propellant and operating for 25,800 hours. Hayabusa solved failures of reaction wheels and chemical thrusters by means of xenon cold gas jet from the ion engine system and aims to return to Earth in 2010.

• 特定非営利活動法人　日本ロケット協会の論文

著者

• KUNINAKA Hitoshi

  Japan Aerospace Exploration Agency

• KAWAGUCHI Jun′ichiro

  Japan Aerospace Exploration Agency

• SHIMIZU Yukio

  Japan Aerospace Exploration Agency

• FUNAKI Ikko

  Japan Aerospace Exploration Agency

• YAMADA Tetsuya

  Japan Aerospace Exploration Agency, Sagamihara

• NISHIYAMA Kazutaka

  Japan Aerospace Exploration Agency

関連論文

• The Results of Asteroid Exploration Mission Hayabusa : Outline of the Operation for 7 Years(Satellite Systems,ICSANE 2010 (International Conference on Space, Aeronautical and Navigational Electronics))
• A Study of Thermal Protection System for HTV-R Reentry
• Deep Space Flight of Microwave Discharge Ion Engines onboard Hayabusa

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