Recent activities in tandem, booster and TRIAC at Tokai

Ishii, Tetsuro  ; Matsuda, Makoto  ; Kabumoto, Hiroshi  ; Osa, Akihiko  

Recent activities in the tandem accelerator facility were reported. The terminal voltage of 19.1 MV was achieved by replacing acceleration tubes with new ones cleaned by high-pressure water-jet method. We have also installed an ECR source on the terminal, which makes it possible to accelerate high-current noble-gas beams. By these developments together with a unique target room allowed to use radioactive and nuclear fuel targets, experiments on nuclear chemistry, nuclear physics and radiation effects of nuclear fuels have been evolved. Using the superconducting booster, nuclear reaction experiments, frequently changing incident beam energies within a short period of time, were carried out. We have succeeded in accelerating short-lived radioactivities of Li, In and Ba with the radioactive nuclear beam accelerator, TRIAC, and have performed experiments on diffusion of Li in ionic conductors and on nuclear astrophysics.