Commissioning and early experiments with ISAC-II

The first phase of the ISAC-II superconducting accelerator has recently been commissioned. The heavy ion linac adds 20MV to the 1.5MeV/u beam injected from the IS AC post accelerator. The linac is composed of five cryomodules; each cryomodule housing four 106 MHz quarter wave resonators and one 9T superconducting solenoid. On-line performance has confirmed cw operation at a peak surface field in excess of 35MV/m. The paper describes the successful commissioning and the early operation with both stable and radioactive beams.