Nuclear Transmutation

 Generation of high brightness gamma ray and its application to transmutation of nuclear waste had been proposed. Recent laser and optical technology allow us to store photons in a cavity. Interaction of electron beam with the stored photon makes an enhancement of gamma ray generation (Compton scattering).

 We have studied a conceptual design of a total system of the nuclear waste transmutation by this method. The system has feasibility for transmutation of FP or TRU with a long life activity by a sharp-shooting of high brightness gamma ray. We performed a test interaction experiment with the low energy electron beam and the stored photon in a supercavity. These results corresponded quite well to the predicted one from cavity storage rate and electron beam energy. Experiments for preliminary nuclear transmutation is underway on 1.5GeV New SUBARU electron storage ring at University of Hyogo.