High bN Experiments at JET in ITER-Like Plasmas in Support of the ITER Steady State Scenario

Low tokamak plasma current, Ip, favours steady-state operation, due to the smaller Non-Inductive (NI) current to be externally driven, and to the higher self-generated bootstrap current fraction Ibs/Ip, for a given plasma pressure. However, this penalizes the energy confinement time tE (µIp), as compared to the basic H-mode value t98(y,2)[1]. Advanced tokamak scenarios aim at compensating for this tE drop, in order to preserve a high fusion gain (Q~5).
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