Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Rapid Communications
Modeling of Plasma Current Decay during Disruptions Caused by Massive Impurity Injection
Hirokazu OHWAKIMasayoshi SUGIHARAAkiyoshi HATAYAMA
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JOURNAL FREE ACCESS

2006 Volume 1 Pages 016

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Abstract

A numerical model is developed to evaluate the decay time of plasma current during the disruption following intense impurity injections. Our model is based on the power balance equation between joule heating and impurity radiation as a way to evaluate the electron temperature and charge state after the thermal quench. The model is applied to the experimental results of massive N2 gas injections in JFT-2M, which simulate the “ingress-of-coolant event” (ICE) as well as disruption mitigations in ITER. It is confirmed that the model can reproduce the experiments reasonably well.

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© 2006 by The Japan Society of Plasma Science and Nuclear Fusion Research
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