Schultz Brad
TH2WH02
Status of the CANREB EBIS at TRIUMF
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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
Paper: TH2WH02
DOI: reference for this paper: 10.18429/JACoW-EBIST2022-TH2WH02
About: Received: 29 Nov 2023 — Revised: 28 Apr 2024 — Accepted: 17 Dec 2024 — Issue date: 05 May 2025
Pulse stretching out of the CANREB EBIS
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.