Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Highly charged ions and their applications
A 18.2: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
A new electron beam ion source as charge breeder for rare isotope beams — •Michael A. Blessenohl1, Stepan Dobrodey1, Zachary Hockenbery1, Renate Hubele1, Thomas Baumann2, José R. Crespo López-Urrutia1, and Jens Dilling3 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2European XFEL, Hamburg, Germany — 3TRIUMF, Vancouver, Canada
TRIUMF is the Canadian national nuclear research facility. Its key equipment is the largest cyclotron in the world, which accelerates protons to 500 MeV. These hit a target composed of heavy elements to produce heavy isotopes, which are then studied in two post-accelerators: ISAC (Isotope Separator and ACcelerator) I and ISAC II.
Currently, the TRIUMF facility is upgraded with ARIEL (Advanced Rare IsotopE Laboratory), which will include a new EBIS (Electron Beam Ion Source) for charge breeding these rare isotopes. Highly charged ions of heavy elements are used to keep the charge-to-mass ratio .1em.5ex0 A−.1em/−.15em.25ex0 Q low, which is required by ISAC I and II. Because the isotopes of interest have short half-lives in the millisecond range and also low abundancies, the whole process of injection, charge breeding and extraction has to be very efficient. The repetition rate of 100 Hz requires fast high voltage control and switching. The goal is to achieve a charge breeding efficiency of at least 20 % in one single charge state. In this work the latest design is presented, including finite element and Monte Carlo simulation results, concepts for the on-line diagnostics and a fast control system.