Abstract

Divertor tile calorimetry is shown to provide accurate routine energy balance in JET. By shifting the plasma from pulse-to-pulse a power profile is reconstructed which shows a narrow high power peak at the outer target, 2 mm mid-plane in width. This feature carries half the total divertor power in a typical type I ELMy H-mode and is the dominant factor determining the in/out divertor energy asymmetry.

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