Ion accelerator and material science

As the research on atomic nucleus physics and elementary particle physics has advanced, the increase of energy of accelerators advanced, and the research institutes in the world which possess the idle accelerators of medium energy have begun to search for their method of utilization. As the result, the research on physical properties by applying ion beam to it has become to be carried out actively. In this report, the Disctron type ion accelerator developed in Ritsumeikan University as one of the electrostatic accelerators in medium energy region and the method of its utilization for the research on physical properties are introduced. Electrostatic accelerators are composed of high voltage generator and ion acceleration tube, and the disc type uses the rotary disc on which metallic pellets are attached as the charge carrier of the high voltage generator. Ritsumeikan University has developed the RIONACK, the laminated Disctron type accelerator, which is explained in detail. The method of utilizing the ion beam obtained with the accelerators of medium energy range is roughly divided into that as microprobe and ion implantation. The state of utilizing the RIONACK is reported. (K.I.)