A baseline scenario of deuterium–tritium (D–T) plasma with peripheral high-field-side fuelling pellets has been produced in JET in order to mimic the situation in ITER. The isotope mix ratio is controlled in order to target the value of 50%–50% by a combination of tritium gas puffing and deuterium pellet injection. Multiple factors controlling the fuelling efficiency of individual pellets are analysed, with the following findings: (1) prompt particle losses due to pellet-triggered edge-localised modes (ELMs) are detected, (2) the plasmoid drift velocity might be smaller than that predicted by simulation, (3) post-pellet particle loss is controlled by transient phases with ELMs.The overall pellet particle flux normalised to the heat flux is similar to that in previous pellet fuelling experiments in AUG and JET.
This paper describes experiments at JET to mimic the fueling of ITER using peripheral high-field-side pellets. The isotope mix is controlled by combining tritium gas puffing and deuterium pellet injection. Key findings include prompt particle losses due to pellet-triggered edge-localized modes, slower plasmoid drift velocity than predicted, and post-pellet particle loss controlled by transient phases with ELMs. The overall pellet particle flux is similar to previous experiments.