(EX/P8-14) Integrated View of Disruption Dynamics on Internal Electromagnetic and Plasma Structures in the Small Tokamak HYBTOK-II

M. Okamoto1), S. Takamura1), N. Ohno2), S. Kajita1), Y. Kikuchi3), Y. Uesugi4), T. Ozeki5), Y. Kawano5), M. Sugihara6)
1) Graduate School of Engineering, Nagoya University, Nagoya, Japan
2) EcoTopia Science Institute, Nagoya University, Nagoya, Japan
3) Graduate School of Engineering, University of Hyogo, Hyogo, Japan
4) Faculty of Engineering, Kanazawa University, Kanazawa, Japan
5) Japan Atomic Energy Agency, Ibaraki, Japan
6) ITER International Team, Naka Joint Work Site, Ibaraki, Japan

Abstract.  Integrated view of disruption dynamics on internal electromagnetic and plasma structures with a high time resolution is presented systematically. Main results are as follows: (i) Observation of electron temperature oscillation due to rotation of the magnetic island of m/n = 3/2 mode before the current quench and (ii) finding of rapid pump-out(10 μs) of plasma current and particles from the central core region just at current quench start time and then returning to a peaked profile during slow decay phase, and (iii) new proposal for the evaluation of current quench time and electron temperature dependence in the current quench time, so called τ/S scaling.

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