The CANadian Rare isotope facility with Electron Beam ion source (CANREB) is an essential part of the Advanced Rare IsotopE Laboratory (ARIEL) presently under construction at TRIUMF. CANREB can accept stable or rare isotope beams from a variety of ion sources, delivering high purity beams of highly charged ions (HCI) to experiments. The injected beams are bunched and cooled using a radiofrequency quadrupole (RFQ) cooler-buncher, and energy adjusted using a pulsed drift tube for injection into an electron beam ion source (EBIS) charge breeder. The EBIS was designed for a maximum electron beam current of 500 mA at a maximum magnetic field of 6 T. The EBIS can accept ion beam energies up to 14 keV and HCI with $3

The CANadian Rare isotope facility with Electron-Beam ion source (CANREB) at TRIUMF is set to deliver rare isotope beams in high charge states. In the Electron Beam Ion Source (EBIS) ions are charge-bred by collisions with an electron beam of up to 500 mA. A strong magnetic field (up to 6T) maximizes the overlap between ions and electron beam and increases the breeding efficiency. Ion confinement is maintained by a combination of an electrostatic field and the electron beam space-charge potential. Ions are released by lowering the trapping potential with a step function. The extraction scheme produces pulses shorter than 10 µs with high instantaneous rates that can saturate detectors in experiments. Stretching the pulse can be done using a slowly varying function to release the ions. The ideal function produces a pulse with a flat top distribution and can be calculated by knowing the ion energy distribution inside the trap. Theoretical calculations, diagnostics improvement as well as early measurements will be discussed.

The CANREB EBIS at TRIUMF has enjoyed an ongoing issue of high-voltage breakdown in the presence of applied magnetic field. This issue continues to prevent using the system at its maximal specifications. In the latest mitigation attempt, the full 15 kV can be applied to the drift-tubes without magnetic field. However, it is only possible to operate at ~7 kV in a 1 Tesla field before discharge occurs. The discharge appears to occur mostly in the collector-trumpet region near the wiring that delivers high-voltage to the drift tubes (the wiring transitions from room temperature to 4 Kelvin). After two different design changes in this area, this high-voltage breakdown with applied B-field has unfortunately not been solved. Here I present OmniTrak 3D simulations of the CANREB EBIS in an ongoing effort to understand the physics of this chronic problem, and to promote lively discussions on other ways to remedy this problem, so that the EBIS can be restored to rare ion beam charge breeding and beam delivery.