Suppression of Discharge Current Oscillations in a Hall Thruster

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概要

• 論文の詳細を見る

• Results of controlling a discharge current oscillation in Hall thrusters at a frequency range of 10–100 kHz are presented. To understand the discharge current oscillation mechanism, the plasma behavior in the acceleration channel was observed with a high-speed camera using a 1-kW class, anode layer type Hall thruster. The emission intensity oscillates equably in the acceleration channel at the same period of the discharge current oscillation; the number density of excited xenon ions oscillates at the same oscillation period and is proportional to the discharge current. These results indicate that the discharge current oscillation is caused by the ionization instability and the number density of plasma oscillates equably in the acceleration channel. Furthermore, the oscillation amplitude was sensitive to the applied magnetic flux density, indicating that this oscillation is affected by electron mobility. The proposed oscillation model based on the experimental results demonstrated that the momentum transfer corresponding to a plasma fluctuation is crucial to achieving stability. Thus, the oscillation amplitude for various acceleration channel configurations—parallel and convergent—was measured, because channel configuration could affect the momentum transfer. The oscillation was successfully suppressed by adopting the convergent configuration, as shown by this model.

• 日本航空宇宙学会,The Japan Society for Aeronautical and Space Sciencesの論文
• 2005-11-04

著者

• ARAKAWA Yoshihiro

  Department of Aeronautics and Astronautics, The University of Tokyo

• Yamamoto Naoji

  Department Of Advanced Energy Engineering Science Kyushu University

• Sasoh Akihiro

  Institute Of Fluid Science Tohoku University

• YOKOTA Shigeru

  Department of Anatomy and Cell Biology, Shjnshu University School of Medicine

• KOMURASAKI Kimiya

  Department of Aerospace Engineering, Nagoya University

• WATANABE Keiko

  Institute of Fluid Science, Tohoku University

• Komurasaki K

  Graduate School Of Engineering Tokyo University

• Arakawa Yoshihiro

  Department Of Aeronautics And Astronautics University Of Tokyo

• Yokota Shigeru

  Department Of Anatomy And Cell Biology Shjnshu University School Of Medicine

• Komurasaki Kimiya

  Department Of Advanced Energy The University Of Tokyo

• Watanabe Keiko

  Institute Of Fluid Science Tohoku University

• Yokota Shigeru

  Department Of Aeronautics And Astronautics The University Of Tokyo

• Arakawa Yoshihiro

  Department Of Aeronautics And Astronautics The University Of Tokyo

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