J-PARC Proton Beam Irradiation Facility Plan

Abstract

For the study of material damage under the beam irradiation circumstance of accelerator-driven systems (ADS), the Japan Atomic Energy Agency (JAEA) had planned to construct a Transmutation Experimental Facility-Target Facility (TEF-T) using J-PARC Linac 400 MeV protons beams and the Lead-Bismuth Eutectic spallation target. The task force for evaluating partitioning and transmutation technology in the Ministry of Education, Culture, Sports, Science and Technology (MEXT) recommended that the facility be considered to maximize the advantages of using Linac to meet users’ various needs. The proton irradiation facility, a successor of TEF-T, is planned to be constructed for 1) Material irradiation examinations, 2) Semiconductor soft-error research using spallation neutrons, 3) Medical RI production, and 4) Proton beam applications for space use. A user community was established in 2022 to incorporate user input as a more attractive facility. In this paper, the present design status of the facility is described.