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The excitation of a novel kind of heavy particle [1, 2] mode at the edge of the plasma column isconsidered as the signature of the I-con nement Regime [3{7]. The outward transport of impuritiesproduced by this mode is in fact consistent with the observed expulsion of them from the mainbody of the plasma column (a high degree of plasma purity is a necessary feature for fusion burningplasmas capable of approaching ignition). Moreover, the theoretically predicted mode phase velocity,in the direction of the electron diamagnetic velocity, has been con rmed by relevant experimentalanalyses [8] of the excited uctuations (around 200 kHz). The plasma \spontaneous rotation" in thedirection of the ion diamagnetic velocity is also consistent, according to the Accretion Theory [9] ofthis phenomenon, with the direction of the mode phase velocity. Another feature of the mode thatpredicted by the theory is that the I-Regime exhibits a knee of the ion temperature at the edge ofthe plasma column but not one of the particle density as the mode excitation factor is the relativemain ion temperature gradient exceeding the local relative density gradient. The net plasma currentdensity appearing in the saturation stage of the relevant instability, where the induced particle andenergy uxes are drastically reduced, is associated with the signi cant amplitudes of the poloidalmagnetic  eld uctuations [6, 7] observed to accompany the density uctuations. The theoreticalimplications of the signi cant electron temperature uctuations [10] observed are discussed.United States. Dept. of Energ

Interpretation of the I-Regime and transport associated with relevant heavy particle modes