WEM1CIO01
LBNL, Berkeley, California, USA
Progress made on high field Nb3Sn magnets for particle accelerators makes possible the development of 4th Generation ECR ion sources capable of operating at a frequency between 40 and 60 GHz with axial magnetic fields up to 8 T. A number of 3rd Generation sources are in operation or development and these sources use NbTi superconducting wire for the magnets, have solenoid fields up to 4 T and operate up to 28 GHz. Based on scaling arguments, the beam intensities for ECR ion sources increase as the square of the operating frequency and going beyond 28 GHz holds great promise for increasing the beam power of driver accelerators used in radioactive beam accelerators such as RIBF in RIKEN, FRIB in Michigan State University and FAIR at GSI. At LBNL, the concepts for the magnet structure using Nb3Sn have been developed and analyzed including methods to assemble and clamp the coils. This is new technology and a research and development phase focused on magnet construction would be the next step towards realizing a 4th Generation ECR ion source.
