THE REX-ISOLDE LINAC

and the REX-ISOLDE collaboration The linear accelerator of the Radioactive beam Experiment (REX-ISOLDE) [1] at ISOLDE/CERN is under progress and the first RFQ-structure is ready for some low level tests. The radioactive ions from the online mass separator ISOLDE will be cooled and bunched in a Penning trap, charge breeded in an electron beam ion source (EBIS) and finally accelerated in a short LINAC to a target energy between 0.8 and 2.2 MeV/u. The LINAC consisting of a Radio Frequency Quadrupole (RFQ) accelerator, which accelerates the ions up to 0.3 MeV/u, an interdigital H-type structure (IH) with a final energy between 1.1 and 1.2 MeV/u and three seven gap resonators, which allow a variation of the final beam energy in the range mentioned above [2,3]. In this paper the design of the LINAC, the status of the structures and the beam dynamics are described.