[Table of Contents]

Plasma and Fusion Research

Volume 8, 2405088 (2013)

Regular Articles

Two Dimensional Imaging Measurement of Magnetic Reconnection Outflow in the TS-4 Toroidal Plasma Merging Experiment
Hiroshi TANABE, Hirotaka OKA, Masanobu ANNOURA, Akihiro KUWAHATA, Kazutake KADOWAKI, Yasuhiro KAMINOU, Setthivoine YOU1), Alexander BALANDIN2), Michiaki INOMOTO and Yasushi ONO
Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 113-0032, Japan
1)
University of Washington, Seatle, Washington 98195-2250, USA
2)
Institute of System Dynamics and Control Theory, Irkutsk 664033, Russia
(Received 7 December 2012 / Accepted 10 April 2013 / Published 15 August 2013)

Abstract

A novel 2D toroidal plasma flow velocimetry has been developed using tomographic reconstruction technique. The 2D imaging of local (R-Z) toroidal velocity is achieved by the vector tomographic reconstruction technique and multi-chord 2D spectroscopy by 35-channel optical fiber array. Numerical simulation for reconstruction of bi-directional toroidal velocity profile suggests that the cost-effective arrangement of the optical fiber for a toroidal plane is 7. We installed the system with 7 × 5 chords arrangement to the TS-4 device. This system successfully measured 2D bi-directional toroidal velocity profile around X point with 10% accuracy during the counter-helicity magnetic reconnection experiment.

Keywords

Doppler shift, vector tomography, toroidal flow, magnetic reconnection, sling-shot

DOI: 10.1585/pfr.8.2405088

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This paper may be cited as follows:

Hiroshi TANABE, Hirotaka OKA, Masanobu ANNOURA, Akihiro KUWAHATA, Kazutake KADOWAKI, Yasuhiro KAMINOU, Setthivoine YOU, Alexander BALANDIN, Michiaki INOMOTO and Yasushi ONO, Plasma Fusion Res. 8, 2405088 (2013).