The ECR ion source at the TRIUMF isotope separator TISOL

The installation at the isotope separator TISOL of a single‐staged ECR (electron cyclotron resonance) ion source has been completed. The source can now routinely deliver radioactive species extracted from the production target when bombarded by 500 MeV protons. Among the radioactive species detected so far are isotopes of He, C, N, O, Ne, Cl, Ar, Kr, and Xe in single‐ and multiple‐charge states as well as as molecular species. The yields obtained exceed in many cases those of the isotope separator ISOLDE at CERN. For stable species the source has shown high efficiencies often exceeding 10%. Details of the source construction, the isotope separator TISOL, and the variation of source parameters under operational conditions will be discussed.