Article Dans Une Revue Journal of Instrumentation Année : 2019

Challenges and prospects of electron cyclotron resonance charge breeders applied to radioactive ion beam facilities

Résumé

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. While existing ECR CB can manage intense incoming 1+ RIB without difficulty, significant amounts of background impurities are extracted with the N+ RIB signal. When the N+ RIB signal is very low, the dominant background can be detrimental to the study of the RIB in today facilities, if no downstream high mass resolution separation is available. This work investigates the improvements achievable with a new generation 18 GHz ECR CB applicable to future facility like EURISOL. The study shows that with a modified ion source geometry, an optimized magnetic confinement, a careful wall metal choice like beryllium, a UHV technology, the charge breeder performance will improve as follows: +20% higher capture efficiency, −40% charge breeding time, charge state ion production with mass over charge of 3 up to xenon and over 6 up to uranium, co-extracted contaminant density reduction by a factor 60 to 600. An 18 GHz ECR CB ion source layout is finally proposed for EURISOL.

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Dates et versions

hal-02073510 , version 1 (20-03-2019)

Identifiants

Citer

T. Thuillier, J. Angot, Maud Baylac, T. Lamy. Challenges and prospects of electron cyclotron resonance charge breeders applied to radioactive ion beam facilities. Journal of Instrumentation, 2019, 14 (02), pp.P02030. ⟨10.1088/1748-0221/14/02/P02030⟩. ⟨hal-02073510⟩
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