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Abstract

The energy flux to the ASDEX-Upgrade divertor plates is routinely measured by thermography and Langmuir probes. The thermographically observed power decay length at the target plate is about 1 cm near the inboard separatrix. During an edge localised mode (ELM) of type I the density profiles are significantly changed; an additional contribution occurs characterised by a power decay length in the order of 10 cm outside the separatrix, and additional power is deposited into the private flux region. It is suggested that this is due to the changing contribution of energy conduction versus convection. Results of ELM-modelling using the coupled B2-EIRENE code reproduce the main features of the experimental observations. The sheath transmission factor is calculated by the combining thermography and Langmuir probe data.

Additional information

Authors: HERRMANN A ET AL., Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);REITER D, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vols. 220-222 (1995) pp. 543-547
Record Number: 199510896 / Last updated on: 1995-08-10
Category: PUBLICATION
Original language: en
Available languages: en
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