Microwave imaging reflectometry in LHD

S. Yamaguchi, Y. Nagayama, R. Pavlichenko, S. Inagaki, Y. Kogi, A. Mase

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A multichannel reflectometry with an imaging optical system is under development for the measurement of the electron density fluctuations in the Large Helical Device (LHD). The right-hand cutoff layer is utilized as a reflection surface. The angle of an ellipsoidal mirror installed inside the vacuum chamber is remotely adjustable with the ultrasonic motor in order to optimize the illumination angle for the wider range of the plasma parameters. An oscillation due to density fluctuation was observed using the microwave imaging reflectometry for the first time in LHD plasma experiment.

Original languageEnglish
Article number10E930
JournalReview of Scientific Instruments
Issue number10
Publication statusPublished - Nov 7 2006


All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Yamaguchi, S., Nagayama, Y., Pavlichenko, R., Inagaki, S., Kogi, Y., & Mase, A. (2006). Microwave imaging reflectometry in LHD. Review of Scientific Instruments, 77(10), [10E930]. https://doi.org/10.1063/1.2349749