Steady improved confinement in FTU high field plasmas sustained by deep pellet injection

High density plasmas (n0 ≈ 8 × 10 20 m -3 ) featuring steady improved core confinement have been obtained in FTU up to the maximum nominal toroidal field (8 T) by deep multiple pellet injection.These plasmas also feature high purity efficient electron-ion coupling and peaked density profiles sustained for several confinement times.Neutron yields in excess of 1 × 10 13 n/s are measured, consistent with the reduction of the ion transport to neoclassical levels.