[2E01-05] Nuclide Production Cross Section, Displacement Cross Section, PHITS

[2E02] Measurement of Cu and Al displacement cross section for proton energy region between 0.4 and 3 GeV

*Shin-ichiro Meigo¹, Hiroki Matsuda¹, Yosuke Iwamoto¹, Hiroki Iwamoto¹, Fujio Maekawa¹, Shouichi Hasegawa¹, Makoto Yoshida², Tatsushi Nakamoto² (1. J-PARC/JAEA, 2. J-PARC/KEK)

Keywords:Displacement cross section, ADS, NRT model, PHITS, 0.4 to 3 GeV

For the accelerator-driven transmutation system (ADS), a development of the beam window, which plays the role of a boundary between the vacuum region of the accelerator and the target region, is crucial. Displacement per atom (DPA) is widely employed to estimate damage on the window, which is derived from the displacement cross section. However, the experimental data on the displacement cross section is scarce for the proton in the energy region of 20 MeV. We have conducted the experiment in J-PARC for the projectile energy range between 0.4 to 3 GeV, which is a candidate energy region in ADS. The displacement cross section can be derived by resistivity change due to proton irradiation on the sample with a cryogenic temperature to maintain damage divided by the proton fluence and resistivity change per Frankel pair. Experiments were conducted at the 3-GeV proton-synchrotron facility at J-PARC Center. In the experiment, copper and aluminum were used as samples. The calculation with the commonly used NRT model was compared with the present experiment. It was found that the calculation of the NRT model overestimates the experiment about 3 times.