Abstract

Radioactive ion beams (RIBs) are an important tool for experiments at the foremostfrontier of nuclear physics. The quasi-continuous radioactive beams from target ion sources ofRIB-facilities have to be accelerated to energies at and beyond the Coulomb barrier. An efficientacceleration requires a suitable A/q of the ions determined by the accelerator design, which canbe reached via the stripping method or by using a charge state breeder like the REX-ISOLDEsystem. In order to get comparable efficiencies for a charge state breeder with the strippingscheme, the breeding efficiency in one charge state has to be optimized by narrowing the chargestate distribution. In addition good beam quality and thus small emittances are required toachieve best transmission in the following accelerator, which is mandatory for high intensityRIBs. For EBIS/T devices the maximum intensity of the radioactive ion beam is a critical issue,and high current EBIS/T devices will be necessary to deal with intensities of second generationRIB facilities.

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