Wave Form of Current Quench during Disruptions in Tokamaks

Masayoshi SUGIHARA; Victor LUKASH; Yasunori KAWANO; Ryuji YOSHINO; Yuri GRIBOV; Rustam KHAYRUTDINOV; Nobuharu MIKI; Junji OHMORI; Michiya SHIMADA

doi:10.1585/jspf.79.706

Contributed Paper

Wave Form of Current Quench during Disruptions in Tokamaks

Masayoshi SUGIHARA, Victor LUKASH, Yasunori KAWANO, Ryuji YOSHINO, Yuri GRIBOV, Rustam KHAYRUTDINOV, Nobuharu MIKI, Junji OHMORI, Michiya SHIMADA

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Keywords: Tokamak, disruption, current quench, ITER

JOURNAL FREE ACCESS

2003 Volume 79 Issue 7 Pages 706-712

DOI https://doi.org/10.1585/jspf.79.706

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Abstract

The time dependence of the current decay during the current quench phase of disruptions, which can significantly influence the electro-magnetic force on the in-vessel components due to the induced eddy currents, is investigated using data obtained in JT-60U experiments in order to derive a relevant physics guideline for the predictive simulations of disruptions in ITER. It is shown that an exponential decay can fit the time dependence of current quench for discharges with large quench rate (fast current quench). On the other hand, for discharges with smaller quench rate (slow current quench), a linear decay can fit the time dependence of current quench better than exponential.

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