Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 1: Collision Experiments
A 1.3: Talk
Monday, March 6, 2017, 15:15–15:30, HS 20
A new electron beam ion source as charge breeder for rare isotope beams — •Michael A. Blessenohl1, Stepan Dobrodey1, Zachary Hockenbery2, Renate Hubele1, Thomas Baumann3, Jens Dilling4, and José R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2McGill, Montreal, Canada — 3European XFEL, Hamburg — 4TRIUMF, Vancouver, Canada
The 500 MeV cyclotron at TRIUMF bombards heavy-element targets with protons to generate rare isotopes for nuclear physics studies at the post-accelerators ISAC (Isotope Separator and Accelerator) I and II. The new Advanced Rare IsotopE Laboratory (ARIEL) will use a new electron beam ion source (EBIS) for charge breeding of those isotopes. At high charge states, the charge to mass ratio .1em.5ex0 A−.1em/−.15em.25ex0 Q can stay low, as required by ISAC I and II. For rare isotopes with half-lives down to 65 milliseconds and low abundances of down to 106 per bunch, the whole process of injection, charge breeding and extraction has to be as efficient as possible. At bunch repetition rates of 100 Hz fast high-voltage control and switching are needed, with a goal charge breeding efficiency of at least 20 %. We present the design including finite-element and Monte-Carlo simulations results, as well as concepts for both on-line diagnostics and control system.