GENERAL-PURPOSE HIGH-PERFORMANCE ELECTRON-CYCLOTRON-RESONANCE ION-SOURCE FOR PRODUCTION OF MULTICHARGED IONS

There is a growing interest for high performance electron cyclotron re sonance ion source (ECRIS) working in various environments and dedicat ed to various purposes. In this article we will present three typical machines using classical FeNdB radial magnets and coils. The first one , called ''SuperNanogan II,'' is a fully permanent magnet machine, cop ying exactly the ECR4 magnetic structure. Here the purpose consists in producing high currents of high charge state ions on a high voltage p latform (up to 250 mu Ae of Ar-40(10+) and Ca-48(11+)). The second one , called ''Super n(+),'' is a very high magnetic field machine dedicat ed to be used as high performance charge booster for the 1(+)/n(+) ISN /GANIL program. The source is built around a - 9 cm minimum \B\ struct ure closing a maximum closed magnetic line of 1.8 T, so allowing funct ioning points from 2.45 to 35 GHz. The third one is a hybrid machine u sing an existing 4 T superconducting mirror field, where it is possibl e to place inside a well optimized 1.6 T FeNdB multipole. This machine can be used as a classical 6.4 to 35 GHz ECR ion source or just as an ''ECR ion trap'' in order to optimize the trapping of hydrogenlike io n for spectroscopic purpose. (C) 1998 American Institute of Physics.