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Modified FIR Laser Interferometer for the Simultaneous Measurements of MHD Plasma Electron Density and Conductivity

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概要 The electron density and electrical conductivity are among the most important parameters governing performance of an MHD power generator. In a large scale MHD channel, further, it will become importa...nt to get information on their fluctuations and correlation between them in a plasma. The farinfrared (FIR) laser has offered a powerful diagnostic tool for measuring these quantities. However, the arrangement of optical components for measureing the electron density and conductivity has been different, that is, the electron density is measured with the FIR laser interferometry and the conductivity with its beam transmissivity. It therefore has not been possible to measure electron density and conductivity simultaneously. In the present work, a modified Michelson interferometer method is proposed which enables their simultaneous measurement and has potentiality to respond even to fast fluctuations. This modified interferometer is tested with a potassium-seeded flame and the obtained electron density and conductivity are found to agree very well with theoretical calculations.続きを見る

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登録日 2010.06.12
更新日 2020.12.15

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