Design Status of Ecr Ion Source and Lebt for Frib*

The Facility for Rare Isotope Beams (FRIB) at Michigan State University will provide intense beams of rare isotopes for research in nuclear physics, nuclear astrophysics and study of fundamental interactions. A Superconducting linac will accelerate the primary beam to energies beyond 200 Mev/u and is designed to reach a maximum beam power close to 400kW on the fragmentation target. In the case of Uranium about 13.3 pμA of U33+ are needed from the ion source to reach this maximum beam power on target. An ECR ion source operating at 28 GHz and based on the VENUS ion source developed at Lawrence Berkeley National Laboratory (LBNL) is currently being designed to meet the project intensity requirement and is presented in this paper. Although the intensity requirement from the ion source are very high for the FRIB project, new results have been obtained recently with VENUS that demonstrate that this ion source can actually produce close to 13pμA of U33+ within the emittance required by the accelerator. In addition an achromatic Low Energy Beam Line (LEBT) capable of transporting concurrently two charge states will be used to transport and accelerate the ion beam coming from the ion source.