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Radiation losses in divertor I of ASDEX Upgrade have been studied at high density when the divertor is detached. Spectroscopic measurements in the visible and VUV spectral range allow a characterization of both the impurity source and the radiation. Despite very low target temperatures of 1 eV, carbon is released from the target with high rates by chemical sputtering, Power losses are estimated from the resonance lines of deuterium and carbon emission is compared with results obtained on JT-60 and DIII-D. Using the Braams-Eirene model of the detached divertor the influence of transport on the power losses is investigated. By means of a realistic radiative loss function we find that the enhancement of maximum power input into the divertor by non-coronal effects is not more than a factor of two.

Additional information

Authors: WENZEL U, Max-Planck-Institut fur Plasmaphysik, Garching (DE);KASTELEWICZ H, Max-Planck-Institut fur Plasmaphysik, Garching (DE);CARLSON A, Max-Planck-Institut fur Plasmaphysik, Berlin (DE);FUCH C, Max-Planck-Institut fur Plasmaphysik, Berlin (DE);NAPIONTEK B, Max-Planck-Institut fur Plasmaphysik, Berlin (DE)
Bibliographic Reference: Article: Plasma Physics and Controlled Fusion, 41 (1999), 801-818
Record Number: 199910929 / Last updated on: 1999-07-09
Original language: en
Available languages: en