Main results from FTU (R=0.93m, a=0.3m, Bt up to 8T, Ip up to 1.6 MA) are presented. Advanced Tokamak (AT) scenarios with improved confinement at ITER relevant magnetic field and densities have been achieved with combined LHCD (8GHz) and ECRF (140 GHz) with mild negative magnetic shear: Electron temperature in excess of 6 keV at ITER relevant densities, H89 up to 1.6 have been achieved. Analysis on the ion transport has shown that the 40% increase in ion temperature and the substantial increase of neutron yield is a result of electron-ion transfer. Synergy between LHCD and ECRF is promising to extend further the AT studies at higher Bt. The first experimental test of an LHCD launcher compatible with ITER demands, the passive active multijunction (PAM), has been successfully tested with an equivalent power density 1.5 times higher than the value matching the ITER request showing similar current drive efficiencies than a conventional launcher. Some supporting Physics experiments such as transport, ablation studies for vertical pellet injection (0.5km/s at mid radius on the high field side), Ion Bernstein Wave experiments (433MHz) and high frequency MHD spectroscopy are also described.

Overview of the FTU Results

A Bruschi;L Carraro;S Cirant;F Gandini;G Granucci;S Nowak;ME Puiatti;P Scarin;A Simonetto;C Sozzi;M Valisa;
2005

Abstract

Main results from FTU (R=0.93m, a=0.3m, Bt up to 8T, Ip up to 1.6 MA) are presented. Advanced Tokamak (AT) scenarios with improved confinement at ITER relevant magnetic field and densities have been achieved with combined LHCD (8GHz) and ECRF (140 GHz) with mild negative magnetic shear: Electron temperature in excess of 6 keV at ITER relevant densities, H89 up to 1.6 have been achieved. Analysis on the ion transport has shown that the 40% increase in ion temperature and the substantial increase of neutron yield is a result of electron-ion transfer. Synergy between LHCD and ECRF is promising to extend further the AT studies at higher Bt. The first experimental test of an LHCD launcher compatible with ITER demands, the passive active multijunction (PAM), has been successfully tested with an equivalent power density 1.5 times higher than the value matching the ITER request showing similar current drive efficiencies than a conventional launcher. Some supporting Physics experiments such as transport, ablation studies for vertical pellet injection (0.5km/s at mid radius on the high field side), Ion Bernstein Wave experiments (433MHz) and high frequency MHD spectroscopy are also described.
2005
Istituto di fisica del plasma - IFP - Sede Milano
Istituto gas ionizzati - IGI - Sede Padova
92-0-100405-2
advanced tokamak scenarios
current drive
radio frequency experiments
tokamak
transport barriers
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/206265
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