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TY - UNPB AU - Zhao, H.W. AU - Sun, L.T. ED - Schaa, Volker RW ED - Pisciotta, Pietro TI - Development and Status of 45 GHz FECR J2 - Proc. of ECRIS2018, Catania, Italy, 10-14 September 2018 C1 - Catania, Italy T2 - International Workshop on ECR Ion Sources T3 - 23 LA - english AB - A 45 GHz superconducting ECR ion source FECR (a first Fourth generation ECR ion source) is being built at IMP. FECR will be the world first Nb3Sn superconducting-magnet-based ECR ion source with 6.5 Tesla axial mirror field, 3.5 Tesla sextupole field on the plasma chamber inner wall and 20 kW @ 45 GHz microwave coupling system. The biggest challenge for FECR is its Nb3Sn superconducting magnet with the maximum magnetic field 11.8 Tesla on the sextupole coils and 11.3 Tesla on the solenoid coils. Optimized design of FECR Nb3Sn superconducting magnet and detailed analysis of the shell-preloading-based mechanical structure illustrates that it is feasible for FECR to work stably at the designed 45 GHz operation fields. However, it is very challenging to manufacture such high field Nb3Sn magnet. A prototype magnet of FECR is being built to verify the magnet mechanical design. 20 kW @ 45 GHz microwave gyrotron system is ready for FECR ion source and was firstly tested with SECRAL-II ECR source to validate 45 GHz microwave coupling. This talk will present technical design and development of FECR focusing on the Nb3Sn magnet and its prototyping. PB - JACoW Publishing CP - Geneva, Switzerland ER -