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 journalArticle

4 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 languageEnglish
Pages (from-to)7083-7084
Number of pages2
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume40
Issue number12
Publication statusPublished - Dec 1 2001

Fingerprint

Plasma density
Interferometry
plasma density
interferometry
switches
Switches
Plasma diagnostics
Carrier concentration
Microwaves
Plasmas
profiles
Costs
costs
intervals
microwaves
radii

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Two-chord interferometry using a pin switch for plasma density measurement. / Yamada, Takuma; Ejiri, Akira; Shiraiwa, Syu N.Ichi; Takase, Yuichi.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 40, No. 12, 01.12.2001, p. 7083-7084.

Research output: Contribution to journalArticle

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