H. Fuenfgelder
(Max-Planck-Institut für Plasmaphysik)
9/8/16, 9:50 AM
Oral
A enhanced impurity production has often accompanied experiments using ICRF (Ion Cyclotron Range of Frequency) as heating method. Positive effects, such as the capability to deposit the power centrally even at high density and thereby reduce the central impurity accumulation, were wiped out in the all‐metal ASDEX Upgrade when the antenna limiters were also coated with W. The hypothesis that...
