Abstract
Experimental results on divertor heat load measurements from ASDEX Upgrade and JET are discussed. Thereby three topics are considered: (i) parameter dependence of steady state heat flux profiles, (ii) spatial distribution of the heat flux profile during type I edge localised modes (ELMs), and (iii) temporal evolution of the energy deposition during type I ELMs. No clear scaling of steady state heat flux profiles with plasma parameters is found. For different data sets a broadening of the heat flux profiles, a constant profile width, as well as a steepening with heating power is found. Extrapolation to ITER requires a review of the data. The heat flux profile is not significantly broadened during type I ELMs. Advantageous is the change of the in/out symmetry. The temporal behaviour of the energy deposition shows a strong increase of the heat flux on time scales of the ion sound speed and an exponential decay with about twice the rise time.
| Original language | English |
|---|---|
| Pages (from-to) | 759-767 |
| Number of pages | 9 |
| Journal | Journal of Nuclear Materials |
| Volume | 313-316 |
| Issue number | SUPPL. |
| DOIs | |
| Publication status | Published - Mar 2003 |
| Event | Plasma - Surface Interactions in Controlled Fusion Devices - Gifu, Japan Duration: 26 May 2002 → 31 May 2002 |
Keywords
- ASDEX Upgrade
- Divertor
- ELMs
- Edge transport
- Heat flux
- JET