Divertor geometry optimization for ASDEX Upgrade
One of the critical questions to be solved for ITER (or any other reactor) is the power exhaust problem (compatible with particle exhaust). Optimized divertors have to be tested in existing geometries based mainly on the idea of closing them very efficiently to the main chamber and, by the choice of the plate and baffle geometry, positively influencing the flow pattern of hydrogen favoring good impurity entrainment. Also, for ASDEX Upgrade there is an experimental necessity for an improved divertor due to the increased heating power (24 MW will be available from 1997 on compared to the present 18 MW). The optimization strategy for the divertor II of ASDEX Upgrade is presented, using elaborate numerical models and codes (B2-Eirene) as well as simple models. The paper starts with the choice of a proper target plate geometry, and then further discusses how main chamber and private flux baffling will be done, and how this affects neutral recirculation pattern and pumping properties. For the final configuration the impurity entrainment properties are analyzed.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 241-243 (1997) pp. 701-706
Record Number: 199711462 / Last updated on: 1997-11-18
Original language: en
Available languages: en