Speaker
Description
The Electron Cyclotron Resonance Ion Source (ECRIS) is a versatile and reliable source to charge-breed rare isotopes in TRIUMF’s Isotopes Separation and Acceleration (ISAC) facility. Significant research work has been done by different groups worldwide to improve the efficiency and performance of the ECRIS as a charge state booster (CSB). The most recent of these research works is the implementation of the two-frequency heating on an ECRIS and optimization of the extraction of charge bred ions.
At the ISAC facility of TRIUMF, a 14.5 GHz PHOENIX booster which has been in operation since 2010 was recently upgraded to accommodate the two-frequency heating system using a single waveguide. The efficiency for charge breeding into a single charge state, which depends on the rare isotope that is being charge-bred, has been determined to be between 1 – 6 %. The charge state booster is being upgraded to improve its charge breeding efficiency. A detailed investigation of the effect of the two-frequency heating technique on the intensity, emittance and the efficiency of the extracted beam is presently being conducted.
Furthermore, the injection and the extraction of highly charged ions from the CSB are also a major topic of the work that can is addressed by simulations. The TRIUMF CSB is being simulated to investigate beam loss at the injection side, as well as the dependence of the emittance of the extracted beam on the plasma and extraction parameters. The results of the investigation will provide a deep understanding of beam tuning to improve the beam quality of the booster. For the ion injection and the extraction simulation, the axial magnetic field of the TRIUMF CSB was recently modelled in OPERA. The modelled magnetic field will be compared with a magnetic field measurement in the future to ensure that the modelled field genuinely described the solenoid magnetic field of the ECRIS.