Abstract
Abstract An impurity seeding scan has been simulated in three different divertor configurations of MAST-U, showing the effect of the divertor geometry on the transition to detachment. The three configurations include a conventional short divertor, a Super-X divertor with large poloidal flux expansion and a Super-X divertor with small poloidal flux expansion. Both Super-X configurations detach at the same impurity seeding rate, while the detachment threshold in the conventional divertor is much higher. A comparison of SOLPS results for all configurations is presented in a detaching plasma with target temperatures around 5 eV. The total power balance, the distribution of radiation and the divertor closure with respect to neutrals and impurities is analyzed.
| Original language | English |
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| Article number | 48570 |
| Pages (from-to) | 1209-1213 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 463 |
| DOIs | |
| Publication status | Published - 22 Jul 2015 |
| Event | Proceedings of the 21st International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Kanazawa, Japan Duration: 26 May 2014 → 30 May 2014 |