摘要：SECRAL (Superconducting ECR Ion Source with Advanced design in Lanzhou) is a next generation ECR ion source, and aims at developing a very compact superconducting ECR ion source with an innovative magnet design, which realizes a minimum-B trap by means of six sextupole coils external to the three axial solenoidal coils, i. e. contrary to what is usually done in any ECR ion sources. In this way, the