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(FTP2/11) The FTU-D Project

E. Barbato¹⁾, A. Bruschi¹⁾, G. Candela¹⁾, R. Cesario¹⁾, P. Chuillon¹⁾, S. Cirant, R. Claesen¹⁾, V. Cocilovo¹⁾, A. Coletti, C. Crescenzi¹⁾, F. Crisanti¹⁾, A. Cucchiaro¹⁾, R. De Angelis¹⁾, G. Fermani¹⁾, M. Gasparotto¹⁾, C. Gormezano²⁾, G. Granucci²⁾, E. Lazzaro¹⁾, G. Maddaluno¹⁾, M. Marinucci¹⁾, G. Mazzitelli²⁾, S. Novak¹⁾, S. Papastergiou¹⁾, V. Pericoli¹⁾, L. Pieroni²⁾, G. Ramponi¹⁾, M. Roccella¹⁾, F. Romanelli¹⁾, M. Santinelli¹⁾, L. Semeraro²⁾, C. Sozzi¹⁾, F. Starace¹⁾, A. A. Tuccillo¹⁾, O. Tudisco¹⁾, V. Vitale¹⁾, L. Zannelli³⁾, R. Albanese³⁾, G. Ambrosino³⁾, M. Ariola³⁾, A. Pironti³⁾, F. Villone¹⁾, G. Vlad
 
¹⁾ EURATOM-ENEA Fusion Association, Frascati, Italy
²⁾ Istituto di Fisica del Plasma CNR Milano, Italy
³⁾ CREATE

Abstract.  A modification of the FTU tokamak (toroidal field B_T = 8T, plasma current I_P = 1.6MA, minor radius a = 0.3m, major radius R = 0.93m) is proposed in order to extend the FTU operation to strongly shaped plasmas (FTU-D: R = 1m, a = 0.18 - 0.2m, elongation $\kappa$ = 1.6, triangularity $\delta$ up to $\delta$ = 0.8). FTU has a circular vacuum vessel and was built to produce circular plasmas, however unbalancing the currents in the windings of the air core transformer a plasma shaping can be produced. Single Null (SN) and Double Null (DN) equilibria have been studied with a maximum current in the range 0.350-0.450 MA. The scientific aim of the project is the investigation of the advanced tokamak operation, characterised by the simultaneous achievement of high $\beta_{\mathrm{N}}^{}$ (normalised beta) and high bootstrap current fraction ( f_B) in regimes with high-energy confinement obtained by current and pressure profile control. The main features of FTU-D, with respect to other existing tokamaks, are the high magnetic field ( B_T = 5 - 2.5T), the high density and aspect ratio value (A = R/a = 5-6) and the possibility of investigating regimes with dominant electron heating.

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