Challenges and prospects of electron cyclotron resonance charge breeding
Résumé
The Electron Cyclotron Resonance charge breeder (ECR CB) is one of the
instruments used to boost the radioactive ion beam (RIB) charge state
(from 1+ to N+) in isotope separator on-line (ISOL) facilities. The important
parameters of a charge breeder are the 1+N+ conversion efficiency, the
charge breeding time and the N+ beam purity. While the ECR CB can
manage intense 1+ beam without difficulty, the present CB generation co
extracts significant amounts of impurities which can be detrimental to the
study of very low intensity N+ RIB in today facilities if no downstream high
mass resolution separation is available. A status of the research activity on
ECR CB is proposed underlining the last progresses and the limits of use.
Prospects to develop a new generation ECR CB with a reduced impurity
co-extraction is proposed. Such an instrument would make possible the
use of the 1+N+ technique in next generation facilities like EURISOL