Interplay Between Confinement, Impurities and MHD in JET Hybrid Pulses with ITER-like Wall.

High confinement improvement (H-factor) relative to the IPB98(y,2) scaling law, stability and bN are achieved in JET hybrid scenario pulses due to formation of specific safety factor (q) profiles with broad flat region around q~1 in the plasma core and steep dq/dr at the edge. The replacement of the C-wall with Be/W-wall caused changes in the impurity content with effect on the q-profile, MHD, radiation and tE. An interaction between these factors in hybrid pulses with ILW has been analysed using transport modelling and important statistical tendencies identified.
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