Preliminary ionization efficiencies of 11C and 14O with the LBNL ECR ion sources

High charge states, up to fully stripped 11C and 14O ion, beams have been produced with the electron cyclotron resonance ion sources (LBNL ECR and AECR-U) at Lawrence Berkeley National Laboratory. The radioactive atoms of 11C and 14O were collected in batch mode with an LN2 trap and then bled into the ECR ion sources. Ionization efficiency as high as 11% for 11C4+ was achieved.