Core and edge confinement studies with different heating methods in JET

摘要

A detailed comparison of core and edge confinement with different heating methods- NBI and ICRH - has been carried out in the ELMy H mode regime in JET with the Gas Box divertor. Transport in the core and characteristics of the edge pedestal have been assessed in discharges at 2.0 MA/2.6-2.7 T at a total input power level of 11 -12 MW. The thermal core confinement has been found to be higher by bout 10/100 in ICRH dominated discharges. Although This difference is well within the uncertainties of the thermal confinement estimation, it has been consistently found In similar experiments in the past and it may be related to the more peaked power deposition provided by ICRH.