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(PDP/4) Steady Improved Confinement in FTU High Field Plasmas Sustained by Deep Pellet Injection

D. Frigione¹⁾, E. Giovannozzi¹⁾, C. Gormezano¹⁾, F. Poli¹⁾, M. Romanelli²⁾, O. Tudisco¹⁾, F. Crisanti¹⁾, B. Esposito¹⁾, L. Gabellieri¹⁾, L. Garzotti³⁾, M. Leigheb¹⁾, D. Pacella¹⁾ and FTU Team
 
¹⁾ Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Italy
²⁾ ENEA-IGNITOR, CR Frascati, Italy
³⁾ Consorzio RFX, Padova, Italy

Abstract.  High density plasmas ( n_o $\sim$ 8×10²⁰m^{- 3}) featuring steady improved core-confinement have been obtained in FTU at the maximum nominal toroidal field (8 T), and lower, by deep multiple pellet injection. These plasmas featured also high purity, efficient electron-ion coupling and peaked density profiles sustained for several confinement times. Neutron yields in excess of 1×10¹³n/s are measured, consistent with the reduction of the ion transport to neoclassical levels.

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