The conditioning procedures in Tore Supra after CIEL implementation

After nearly two years of shutdown for the installation of the new inner components of CIEL project, standard conditioning procedures have been carried out (bakeout, D 2 GDC and HeGDC) with a new glow discharge cleaning (GDC) hardware. 50 g of water and 20 g of hydrogen were removed during the initial bakeout and 650 A h of D 2 GDC and 100 A h of HeGDC have allowed plasma restart. CO production during D 2 GDC, about three times higher than in HeGDC, showed a strong dependence on the wall temperature in the 150-200 °C range. Furthermore, it has been possible to restart plasmas after different de-conditioning events when the CO production rate reaches 4 x 10 16 mol-ecules/s/A at 200 °C wall temperature. However, D 2 GDC led to the removal of large amount of carbon (∼2 × 10 24 eroded carbon atoms/year). Besides, HeGDC was successfully used to decrease deuterium wall concentration after D 2 GDC. The time evolution of the isotopic ratio was found to decrease from 100% to about 60% at the end of the campaign.