Commissioning-results of the REX-ISOLDE linac

At REX-ISOLDE at ISOLDE/CERN radioactive ions are post accelerated with a 10 meters linac for experiments in nuclear-, astro- and solid state physics. For the efficient acceleration to energies between 0.8 and 2.3 MeV/u the principles of charge breeding of radioactive ions by an electron beam source was introduced at REX. The linac in its current stage consists of a 4-rod RFQ, a 20-gap IH drift tube cavity and three seven-gap splitting resonators. It is able to accelerate up to a mass to charge ratio of 4.5. 2002 has been the first year of nuclear physics experiments with REX-ISOLDE. The experiments done so far using Coulomb excitation and particle transfer reactions require good beam quality at the two target stations. Therefore commissioning measurements of the linac were made and are still being done. The results of those measurements will be presented showing the current energy spreads and radial emittances of the different cavities.