Oblique pellet injection experiments have been performed in RTP ohmic andelectron cyclotron (EC) heated plasmas. Peripheral cooling induces a transientrise of the electron temperature (Te) in the plasma core, with theformation of a region of a high Te gradient (transient transportbarrier). The position of the barrier appears to be linked with the location oflow-order rational magnetic surfaces. For Ohmic and EC heated plasmas withresonance moderately off-axis, the Te rise is peaked in the plasmacentre and the footpoint of the barrier is located close to the q = 2 surface.For EC plasmas with far off-axis resonance, i.e. in plasmas exhibiting hollowTe profiles, the Te rise starts off-axis, near the innermost loworder rational surface (typically q = 3). It then propagates to the centre in aseemingly diffusive way.
Research on stiff transport in electron heating dominated plasmas in EAST