Plasma Diagnostics and Thrust Performance Analysis of a Microwave-Excited Microplasma Thruster
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概要
- 論文の詳細を見る
A microwave-excited microplasma source for a miniature electrothermal thruster has been investigated by optical emission spectroscopy and an electrostatic probe. The microplasma source is made of a dielectric tube 10 mm long and 1.5 mm in inner diameter, producing high temperature Ar plasmas in the pressure range from 5 to 40 kPa. Plasma diagnostics showed that higher microwave frequencies and dielectric constants resulted in desirable plasma characteristics: electron densities of $10^{17}$–$10^{19}$ m-3 and rotational temperatures of 700–1800 K at microwave powers below 10 W. Moreover, the temperature increased toward the exit of the plasma chamber where a micronozzle is equipped. Numerical analysis of thrust performance based on the plasma diagnostics indicated that smaller throat diameters of the micronozzle produced better thrust performances: thrusts of 0.98–1.2 mN and specific impulses of 67–81 s.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-10-30
著者
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Eriguchi Koji
Department Of Aeronautics And Astronautics Graduate School Of Engineering Kyoto University
-
Takao Yoshinori
Department Of Aeronautics And Astronautics Graduate School Of Engineering Kyoto University
-
Takahashi Kazuo
Department Of Advanced Medical Technology And Development Bml Inc.
-
Ono Kouichi
Department Of Aeronautical Engineering Faculty Of Engineering Kyoto University
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Takao Yoshinori
Department of Aeronautics and Astronautics, Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
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