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

4 Scopus citations

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 (US)
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
State	Published - Dec 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Engineering
General Physics and Astronomy

Keywords

Density profile
Interferometry
Microwave
Pin switch
Plasma
Spherical tokamak

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10.1143/jjap.40.7083

Cite this

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title = "Two-chord interferometry using a pin switch for plasma density measurement",

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.",

keywords = "Density profile, Interferometry, Microwave, Pin switch, Plasma, Spherical tokamak",

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 (US)",

volume = "40",

pages = "7083--7084",

journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

number = "12",

}

TY - JOUR

T1 - Two-chord interferometry using a pin switch for plasma density measurement

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.

KW - Density profile

KW - Interferometry

KW - Microwave

KW - Pin switch

KW - Plasma

KW - Spherical tokamak

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JO - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

IS - 12

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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