The Effect of the Super-X Divertor of MAST Upgrade on Impurity Radiation as Modelled by SOLPS

The Effect of the Super-X Divertor of MAST Upgrade on Impurity Radiation as Modelled by SOLPS

The Effect of the Super-X Divertor of MAST Upgrade on Impurity Radiation as Modelled by SOLPS 150 150 Mathew
CCFE-PR(17)17

The Effect of the Super-X Divertor of MAST Upgrade on Impurity Radiation as Modelled by SOLPS

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 divertorwith 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.

Collection:
Journals
Journal:
Journal of Nuclear Materials
Publisher:
Elsevier
Published date:
08/01/2015