• M. Ichikawa, H. Fujisawa, Y. Iwashita, T. Sugimoto, H. Tongu, M. Yamada
  Kyoto ICR, Uji, Kyoto

We are aiming to develop a compact accelerator based neutron source using Li(p,n) reaction. The first target is a small and high current H⁺ ion source as an injector of the neutron source. The demands are not only being small and high current but also longer MTBF and large ratio of H⁺ to molecular ions such as H²⁺ or H³⁺. Therefore, the ECR ion source with permanent magnets is selected as such an ion source. Because ECR ion sources don't have hot cathodes, longer MTBF is expected. Furthermore, they can provide high H⁺ ratio because of their high electron temperature. Using permanent magnets makes the ion source small and running cost low. Up to now, we have measured ion beam current on the first model of the ECR ion source, and fabricated the redesigned model. The data measured of the second model will be presented.