PRODUCTION OF MULTICHARGED RADIOACTIVE ION-BEAMS - THE 1(-STATE TRANSFORMATION FOR THE PRODUCTION, IONIZATION, ACCELERATION-DE-FAISCEAUX-EXOTIQUES PROJECT() TO N(+) CHARGE)

Two types of 1(+)-->n(+) ion conversion devices have been developed fo r the Production, Ionisation, Acceleration de Faisceaux Exotiques proj ect. Both can be utilized for short lived radioactive ions beams. They are based on collisions inside an electron cyclotron resonance ion so urce (ECRIS). They transform a 1(+) ion beam into a n(+) ion beam in l ess than 0.1 s. In the first device, ions are introduced into the ECR plasma through the extraction hole (backward injection), in the second device they are introduced as usual (forward injection). The particle conversion efficiencies can reach for noble gases similar to 6.5% for Kr9+/Kr1+ and for alkali elements similar to 2.8% for Rb9+/Rb1+. (C) 1997 American Institute of Physics.