Reactor relevant ICRF heating in JET DT plasmas

摘要

Ion cyclotron resonance heating experiments have been carried out in reactor relevant scenarios during the deuterium-tritium (DTE1) campaign in JET. For the first time it was possible to assess the scheme with a deuterium minority in tritium plasmas: this produced a steady state DT fusion power of up to 1.66 MW for input ICRF power of 6 MW. Strong ion heating, with a core ion temperature of up to 13 keV, was observed when using ~3He minority heating in both 50:50 DT and tritium dominated H mode plasmas. Second harmonic tritium heating was also studied and, as expected for JET plasma conditions, produced mainly electron heating. Finally, the ‘inverted' scenario of tritium minority in deuterium was successfully demonstrated.