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(CDP/07) Electron Cyclotron Heating at 140 GHz on FTU Tokamak in Steady-State Conditions and During Current Ramp-Up

(This paper was rapporteured in lecture CD1/3)

S. Cirant, FTU Team and ECRH/IFP Group¹

Associazione EURATOM-ENEA sulla Fusione, Centro Ricerche Energia Frascati, Frascati, Italy
¹ Associazione EURATOM-ENEA sulla Fusione, Istituto di Fisica del Plasma, Milano, Italy

Abstract.  Localized absorption of EC waves at 140 GHz, 0.7 MW, in FTU us used to shape the current density profile ( q_a $\approx$ 6) in a way to affect sawteeth. If absorption is localized near the inversion radius, temporary stabilization occurs. Sawteeth with a small inversion radius (r/a < 0.2) do not affect electron energy confinement. Energy transport appears diffusive, and global confinement is found to be in good agreement with ITER89P L-mode scaling law.

Read the full paper in PDF format.