Microwave imaging reflectometry in LHD

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

doi:10.1063/1.2349749

Microwave imaging reflectometry in LHD

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

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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 language	English
Article number	10E930
Journal	Review of Scientific Instruments
Volume	77
Issue number	10
DOIs	https://doi.org/10.1063/1.2349749
Publication status	Published - 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.2349749

Cite this

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title = "Microwave imaging reflectometry in LHD",

abstract = "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.",

author = "S. Yamaguchi and Y. Nagayama and R. Pavlichenko and S. Inagaki and Y. Kogi and A. Mase",

note = "Funding Information: Technical assistance from S. Sugito and Y. Ito from the Department of Engineering and Technical Services of NIFS is gratefully acknowledged. This work is supported by the budget of the National Institute for Fusion Science, NIFS05KEIN0021, NIFS05KEIN0031, and NIFS05ULPP525. ",

year = "2006",

doi = "10.1063/1.2349749",

language = "English",

volume = "77",

journal = "Review of Scientific Instruments",

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TY - JOUR

T1 - Microwave imaging reflectometry in LHD

AU - Yamaguchi, S.

AU - Nagayama, Y.

AU - Pavlichenko, R.

AU - Inagaki, S.

AU - Kogi, Y.

AU - Mase, A.

N1 - Funding Information: Technical assistance from S. Sugito and Y. Ito from the Department of Engineering and Technical Services of NIFS is gratefully acknowledged. This work is supported by the budget of the National Institute for Fusion Science, NIFS05KEIN0021, NIFS05KEIN0031, and NIFS05ULPP525.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

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IS - 10

M1 - 10E930

ER -

Microwave imaging reflectometry in LHD

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