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The high plasma resistance observed in tokamak disruptions with a very rapid current decay is attributed to cooling by a rapid influx of neutral atoms from the wall or limiter. It is suggested that this influx proceeds as a dense localized cloud expanding from the edge to the centre of the plasma. The result of such a cooling, with carbon as the limiting material, is a drop in temperature to approximately 4 eV and an increase in electron density by an order of magnitude
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Ward et al. (1992) studied this question.
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