Speaker
Description
At the Isotope mass Separator On-Line DEvice (ISOLDE) facility based at CERN, rare isotopes are produced from 1.4 GeV-proton collisions onto a target. Radioactive ion beams of interest are either delivered to low-energy experimental stations or manipulated and accelerated to higher energies, through REX/HIE-ISOLDE post-accelerator. Prior to post-acceleration through REX/HIE-ISOLDE linac, ions of interest are charge-bred in the REX-Electron Beam Ion Source.
A method is presented to characterize residual gas contamination extracted from REXEBIS at an intensity scale lower than sub-femto Ampere ion beam currents. Sets of contamination spectra are compared for two different types of electron guns, depending on key operational parameters, such as the confinement time and the electron charge density. The general performances of REXEBIS are evaluated and an attempt is made to correlate experimentally probed mechanisms with simulations.