Completion of the ISAC-I accelerator for radioactive ions and extension to ISAC-II

Since 1998 the TRIUMF H- cyclotron has been equipped with a new 500 MeV proton extraction beam line dedicated to the new ISAC facility (Isotope Separator and ACcelerator). Up to 40 μA have so far been delivered to the ISAC target system for routine radioactive beam production. 100 μA (the ISAC primary beam design intensity) were also delivered for a specific target test. Initial ISAC experiments were performed with singly charged radioactive ions at target/ion-source energies (E ≤ 60 keV/u). A cw linac based on a 35.4 MHz 8 m long RFQ (A/q ≤ 30) followed by a 106 MHz post-stripper DTL (3 ≤ A/q ≤ 6) has recently been commissioned and now delivers radioactive ion beams to experiments at energies between 0.153 and 1.53 MeV/u (A ≤ 30). Recently, TRIUMF was also funded to proceed with the construction of the ISAC-II expansion, which will accelerate beams of A ≤ 150 up to energies of at least 6.5 MeV/u, above the Coulomb barrier. Recent milestones, initial operational experience with ISAC-I and first results from ISAC-II prototyping are reported. (author)