Improving far-infrared laser measurements of mhd plasma electron density and conductivity

Mitsuharu Masuda, Yukio Watanabe, Tomoaki Ikegami, Masanori Akazaki, Hironori Nakamuta

研究成果: ジャーナルへの寄稿記事

抄録

Electron density and electrical conductivity are among the most important parameters governing performance of an MHD power generator. The far-infrared laser has offered a powerful diagnostic tool for measuring these quantities. However, clarifying the effects of the neutral gases and the laser beam refraction will improve accuracy. In the present paper, the variable-wavelength far-infrared laser was used to address these effects. In electron density measurement with a Michelson interferometer, the definite fringe shift due to neutral gases in the flame was detected, and the effects of neutral gases, especially the rotational absorption of water vapor, were quantitatively clarified. A method involving integrating beam intensity profiles is also suggested to account for the beam refraction effect of the conductivity measurements. The electron density and conductivity measured with corrections for these effects agree very well with theoretical calculations.

元の言語英語
ページ(範囲)68-72
ページ数5
ジャーナルJournal of Propulsion and Power
4
発行部数1
DOI
出版物ステータス出版済み - 1 1 1988

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Infrared lasers
infrared lasers
electron density
Carrier concentration
conductivity
laser
Refraction
Plasmas
neutral gases
plasma
Electron density measurement
Gases
Michelson interferometers
refraction
Magnetohydrodynamics
Water vapor
Laser beams
gas
electric generators
Wavelength

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

これを引用

Improving far-infrared laser measurements of mhd plasma electron density and conductivity. / Masuda, Mitsuharu; Watanabe, Yukio; Ikegami, Tomoaki; Akazaki, Masanori; Nakamuta, Hironori.

:: Journal of Propulsion and Power, 巻 4, 番号 1, 01.01.1988, p. 68-72.

研究成果: ジャーナルへの寄稿記事

Masuda, Mitsuharu ; Watanabe, Yukio ; Ikegami, Tomoaki ; Akazaki, Masanori ; Nakamuta, Hironori. / Improving far-infrared laser measurements of mhd plasma electron density and conductivity. :: Journal of Propulsion and Power. 1988 ; 巻 4, 番号 1. pp. 68-72.
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