Study on the beamloss at J-PARC Linac section by using Geant4 simulation

Maruta, Tomofumi; Kikuzawa, Nobuhiro ; Sako, Hiroyuki   ; Miura, Akihiko 

Japan Proton Accelerator Research Complex (J-PARC) is a high intensity proton accelerator facility in Japan. Since it will reach to 100 times higher beam intensity than KEK-PS. it is quite important to suppress radioactivation of beamline component as low as possible in order to keep easiness of hand maintenance. We suppose most of the ratioactivation comes from the scattering of beam particle with residual gas inside beam duct, a simulation based on the physical quantities such as cross-section is necessary to study on the loss. Now I'm developing a Geant4 simulation tool for the beamloss study. In this presentation, I will show the present status of the study.