[8a-PB5-1~3] 8.8 Plasma Electronics English Session

▲ [8a-PB5-2] Measurement Electron Density of Atmospheric Pressure Plasma by Mach-Zehnder Interferometer using CO₂ and He-Ne Laser

〇Takafumi Yamada¹, Makoto Matsui¹ (1.Shizuoka Univ.)

Keywords:Mach-Zehnder interferometer, electron density

It is reported that there is discrepancy between predictions and experimental results with regard to the electron number density in the shock layer with shock velocity over 10 km/s. Precursor photoionization is one candidate to cause the discrepancy. To clarify the phenomenon, it is necessary to measure the electron density ne distribution from across a strong shock wave Then, we are developing a Mach-Zehnder interferometer whose measurement range and time resolution is n_e=10¹⁹-10²² m^-3, above 1 ms, respectively. And we aim at application to hyper velocity shock wave and measurement electron density. In this study, we develop interferometers using CO₂ and He-Ne laser, and we measure electron density of atmospheric pressure plasma