UPGRADE OF THE ISAC TIME-OF-FLIGHT SYSTEM

The ISAC accelerators at TRIUMF accelerate stable and radioactive ion beams in a wide range of intensities and energies. The beam diagnostics was designed with the aim to support the beam delivery in every possible operating regime. The ISAC-II time-of-flight (TOF) system is capable of measuring the beam velocities at intensities ranging from 10 down to ~ 10 ions per second. It consists of three high resolution timing secondary electron emission monitors with associated acquisition electronics and software and has been in operation since 2006. Recently all monitors were rebuilt in order to facilitate their alignment with respect to the ion beam. At the same time the system was also equipped with an UV alignment and calibration laser system that allows performing an accurate absolute calibration and functionality check of the monitors without a need for an ion beam.