Aungcharoen T.Ruffolo D.Klaywittaphat P.Chatthong B.Mahidol University2025-02-182025-02-182025-01-01Journal of Physics: Conference Series Vol.2934 No.1 (2025)17426588https://repository.li.mahidol.ac.th/handle/20.500.14594/105348The understanding of fundamental dynamics during the transition from low to high confinement mode in magnetically confined plasma is significant. This process requires a certain amount of external power to initiate the transition. In this work, we utilize a primitive model to study the dynamics of the transition with the preceding limit-cycle oscillation during power ramp-up. In addition, we show that the increasing linear zonal flow damping rate delays the onset of transitions and extends the duration of the oscillatory phase, suggesting the external particle injection leads to a delay of transition and power threshold upshift.Physics and AstronomyConference PaperSCOPUS10.1088/1742-6596/2934/1/0120382-s2.0-8521755117417426596