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Hemmi, Tsutomu; Kajitani, Hideki; Matsui, Kunihiro; Koizumi, Norikiyo
no journal, ,
no abstracts in English
Iwamoto, Yosuke; Niita, Koji*; Sawai, Tomotsugu; Iwamoto, Hiroki; Harada, Masahide; Ronningen, R. M.*; Baumann, T.*
no journal, ,
Recently, we have developed a calculation method of the displacement cross-sections in the energy range from 10
MeV to 3 GeV, including event generator and Coulomb scattering in the Particle and Heavy Ion Transport code System (PHITS). Including the defect production efficiencies as a function of the damage energy, calculated results for low-energy neutron and proton irradiation on copper and 1.1 and 1.94 GeV protons on copper gave good agreements with experimental data. As a results of application of J-PARC ADS target test facility (TEF-T) at a beam window and a irradiation specimen, the contribution of protons to DPA values is higher than that of neutrons by a factor of about three.
-rays on cyanate ester / epoxy resinsIdesaki, Akira; Uechi, Hiroki*; Hakura, Yoshihiko*; Matsuda, Satoshi*; Kishi, Hajime*
no journal, ,
Cyanate ester / epoxy resins are expected to be applied for electrical insulating material used in a superconducting magnet system at J-PARC muon beam line. In this work, radiation degradation mechanism of cyanate ester / epoxy resin was investigated. It was found that crosslinking structure formed between cyanate ester and epoxy is disintegrated by -ray irradiation and gases of hydrogen, carbon dioxide, and so on, evolve. While flexural strength of resin after the irradiation decreased, the resin retained its flexural strength of 180 MPa which is about 90% of initial value.
Sasa, Toshinobu
no journal, ,
The outline and design status of the J-PARC Transmutation Experimental Facility is introduced in the international meeting on radiation effects in superconducting materials. As one of the proposal of multipurpose application of Transmutation Experimental Facility, neutron irradiation under superconducting state in very low temperature is planned. In the meeting, requirements, needs and usability of the proposed experiments will be discussed and present status of applicability of the proposal is introduced.