ThuPE31 ; International audience ; In the framework of the SPIRAL1 upgrade under progress at the GANIL lab, the charge breederbased on a LPSC Phoenix ECRIS, first tested at ISOLDE has been modified to benefit of thelast enhancements of this device from the 1+/n+ community. The modifications mainly concernthe 1+ optics, vacuum techniques, and the RF—buffer gas injection into the charge breeder. Priorto its installation in the midst of the low energy beam line of the SPIRAL1 facility, it has beendecided to qualify its performances and several operation modes at the test bench of LPSC lab. Thiscontribution shall present preliminary results of experiments conducted at LPSC concerning the 1+to n+ conversion efficiencies for noble gases as well as for alkali elements and the correspondingtransformation times.