Two-chord interferometry using a pin switch for plasma density measurement

Takuma Yamada; Akira Ejiri; Syu N.Ichi Shiraiwa; Yuichi Takase

doi:10.1143/jjap.40.7083

Two-chord interferometry using a pin switch for plasma density measurement

Takuma Yamada, Akira Ejiri, Syu N.Ichi Shiraiwa, Yuichi Takase

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

2 Citations (Scopus)

Abstract

Microwave interferometry is a useful diagnostic for measuring the line-integrated density of plasmas. To obtain a detailed profile of the electron density, multi chord interferometry is indispensable. Using a pin switch, we have successfully measured the density along two chords by alternating the beam with a time interval of 2 μs for each chord. This method is very cost advantageous, because it requires only one set of sources and detection components. The system has been applied to Tokyo Spherical Tokamak-2 (TST-2) to measure two vertical chords at different major radii. It is shown that from the densities measured along the two chords, profile changes can be deduced.

Original language	English
Pages (from-to)	7083-7084
Number of pages	2
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	40
Issue number	12
DOIs	https://doi.org/10.1143/jjap.40.7083
Publication status	Published - Dec 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy(all)

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10.1143/jjap.40.7083

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abstract = "Microwave interferometry is a useful diagnostic for measuring the line-integrated density of plasmas. To obtain a detailed profile of the electron density, multi chord interferometry is indispensable. Using a pin switch, we have successfully measured the density along two chords by alternating the beam with a time interval of 2 μs for each chord. This method is very cost advantageous, because it requires only one set of sources and detection components. The system has been applied to Tokyo Spherical Tokamak-2 (TST-2) to measure two vertical chords at different major radii. It is shown that from the densities measured along the two chords, profile changes can be deduced.",

author = "Takuma Yamada and Akira Ejiri and Shiraiwa, {Syu N.Ichi} and Yuichi Takase",

year = "2001",

month = dec,

doi = "10.1143/jjap.40.7083",

language = "English",

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AU - Yamada, Takuma

AU - Ejiri, Akira

AU - Shiraiwa, Syu N.Ichi

AU - Takase, Yuichi

PY - 2001/12

Y1 - 2001/12

N2 - Microwave interferometry is a useful diagnostic for measuring the line-integrated density of plasmas. To obtain a detailed profile of the electron density, multi chord interferometry is indispensable. Using a pin switch, we have successfully measured the density along two chords by alternating the beam with a time interval of 2 μs for each chord. This method is very cost advantageous, because it requires only one set of sources and detection components. The system has been applied to Tokyo Spherical Tokamak-2 (TST-2) to measure two vertical chords at different major radii. It is shown that from the densities measured along the two chords, profile changes can be deduced.

AB - Microwave interferometry is a useful diagnostic for measuring the line-integrated density of plasmas. To obtain a detailed profile of the electron density, multi chord interferometry is indispensable. Using a pin switch, we have successfully measured the density along two chords by alternating the beam with a time interval of 2 μs for each chord. This method is very cost advantageous, because it requires only one set of sources and detection components. The system has been applied to Tokyo Spherical Tokamak-2 (TST-2) to measure two vertical chords at different major radii. It is shown that from the densities measured along the two chords, profile changes can be deduced.

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Two-chord interferometry using a pin switch for plasma density measurement

Abstract

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