| 摘要 |
The invention comprises of four magnet system for dispersing and recombining precisely several isotopes for injection into a tandem accelerator. The precise horizontal focusing of the ions is achieved magnetically using curved boundaries of the magnets which have normal entrance and exit boundaries for the central trajectories. The precise vertical focusing is achieved mainly by the electric slot lenses in the first version, with small adjustments of the focusing of the isotopes, other than the central trajectory isotope, by curved boundaries of the magnet. It is the use of the electric slot lenses, or a similar electric device with one dimensional focusing, which in part decouples the focusing action in the vertical plane from the horizontal plane, that permits the use of four fold magnetic symmetry and boundary curvature to accomplish true recombination of the isotopes in a practical and compact device.
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