At ISOLDE(CERN),an on-line test bench is dedicated to charge breeding experiments with a 14GHz Phoenix ion source,for the investigation of the 1+→ n+ scenario at next generation ISOL-type facilities.This year,various technical developments have been undertaken for intensifying the tests of the online performances of the booster with a high diversity of stable and radioactive ion beams.This contribution will present an overview of the latest developments,the current challenges,and some perspectives for the future use of the Phoenix booster for physics experiments at ISOLDE.