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- W. Lu, B.H. Ma, L.T. Sun, H. Wang, D. Xie, X.Z. Zhang, H.W. Zhao
IMP, Lanzhou, People's Republic of China
- L. Ruan, B. Xiong
IEE, Beijing, People's Republic of China
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A new room temperature ECR ion source, LECR4-DRAGON to operate at 18 GHz, is under development for the SSC-LINAC project at IMP. In comparison to other room temperature ECRISs, one unique feature of LECR4-DRAGON is that its plasma chamber is of ID 126 mm that is the biggest chamber for a room temperature ECRIS and the same as the superconducting ECR ion source SECRAL. Because the project funding requests testing a different magnet cooling scheme, solid quadrate copper coils cooled by medium evaporation at about 50oC are to be used to produce a maximum axial magnetic field of about 2.5 T at injection and 1.4 T at the extraction, which are similar to SECRAL operating at 18 GHz. Furthermore, a large bore non-Halbach permanent sextupole with staggered structure has been under fabrication which can produce a radial magnetic field reaching 1.5 T at the plasma chamber wall for operation at 18 GHz. The progress updates and discussions of this new ion source will be presented in this paper.
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