[Table of Contents]

Plasma and Fusion Research

Volume 2, S1108 (2007)

Regular Articles


Development of 2-D Thomson Scattering Measurement Using Multiple Reflection and the Time-of-Flight of Laser Light
Takashi SUMIKAWA, Kouhei YAMASHITA, Eiichirou KAWAMORI1), Kazumichi NARIHARA2) and Yasushi ONO
Graduate School of Frontier Science, the University of Tokyo, Tokyo 113-8656, Japan
1)
High Temperature Plasma Center, the University of Tokyo, Tokyo 113-8656, Japan
2)
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 8 December 2006 / Accepted 5 July 2007 / Published 20 November 2007)

Abstract

A new two-dimensional Thomson scattering measurement (2-D TS) system has been developed using multiple reflections and time-of-flight (TOF) of laser light. Its new ideas of our 2-D TS system are (1) to reflect YAG laser light for multiple times to cover the whole r - z plane of the ST (Spherical Tokamak) plasma, and (2) to reduce the number of polychromators and detectors using the time delay of the scattered light along the laser beam. We measured for the first time, Rayleigh scattering light signals with 50 ns time difference from two measurement points using a single detector, demonstrating the basic principle of the 2-D Thomson scattering system.


Keywords

Thomson scattering, two-dimensional measurement, Rayleigh scattering, Raman scattering

DOI: 10.1585/pfr.2.S1108


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This paper may be cited as follows:

Takashi SUMIKAWA, Kouhei YAMASHITA, Eiichirou KAWAMORI, Kazumichi NARIHARA and Yasushi ONO, Plasma Fusion Res. 2, S1108 (2007).