Measurement of Plasma Behavior with High Speed Cameras in TOKASTAR-2

Tatsuya SAKITO; Hideki ARIMOTO; Takaaki FUJITA; Tomohiro UEDA; Yuusuke SHIMOOKA; Hiromasa ITOU; Kenji MURAOKA

doi:10.1585/pfr.10.3402033

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Measurement of Plasma Behavior with High Speed Cameras in TOKASTAR-2

Tatsuya SAKITO, Hideki ARIMOTO, Takaaki FUJITA, Tomohiro UEDA, Yuusuke SHIMOOKA, Hiromasa ITOU, Kenji MURAOKA

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Keywords: TOKASTAR, tokamak, stellarator, hybrid confinement, tokamak discharge, helical field applied, high-speed camera

JOURNAL FREE ACCESS

2015 Volume 10 Pages 3402033

DOI https://doi.org/10.1585/pfr.10.3402033

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Abstract

The position and shape of plasma were evaluated in TOKASTAR-2 by high-speed cameras. In tokamak experiment, improvement of the plasma equilibrium control by adjusting the vertical field was observed in the tangential sightline. The plasma center was located at the equatorial plane (Z = 0 cm) and the plasma disappeared in contact with the inner legs of TF coils. In helical experiment, it was observed in the radial sightline that the plasma was stable below the equatorial plane when the EC resonance layer was located within the last closed magnetic surface.

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