Particle and Astroparticle Physics Seminar

Accelerator developments and model-based beam operation for accelerated rare isotope beams at TRIUMF

Oliver Kester

TRIUMF

Post acceleration of rare isotope beams produced by the Isotope Separator and ACcelerator (ISAC) facility at TRIUMF, requires new developments in particle accelerator systems. Experiments using beam from ISAC, require beam of isotopes from all mass regions of the nuclear chart, with high beam quality and purity. For this purpose, new high-resolution mass separation schemes, beam cooling techniques, charge state breeding and rf-acceleration systems are employed at TRIUMF, making beam operation very complex.

To accommodate at the ISAC facility frequent changes of beam species (isotope), mass to charge ratio and beam energy tailored to experiment requirements, rapid beam tuning is mandatory. Therefore, beam operation must be based on a complete beam optics model of the accelerator complex. TRIUMF is using a second order Hamiltonian based envelope code TRANSOPTR to establish such a model for all systems at ISAC. The detailed understanding of the ISAC accelerator systems and the model of the beam physics in TRANSOPTR will lead to automatic tuning procedures in the long term.

An introduction and overview of the physics principles of the different ISAC systems will be given and the principle of a Hamiltonian base envelope code to model the ISAC post accelerator facility and to allow for tuning automation will be explained.