Completion of J-PARC 1MW pulsed spallation neutron source facility, 2; Mercury target system

Haga, Katsuhiro  ; Kogawa, Hiroyuki  ; Wakui, Takashi  ; Okamoto, Yoshihisa; Futakawa, Masatoshi  ; Aizawa, Hideyuki*; Kinoshita, Hidetaka   ; Hoshino, Yoshihiro; Kaminaga, Masanori  ; Kato, Takashi

The construction of the 1MW class mercury target which the world highest level as the spallation neutron source is going on under the J-PARC project. The mercury target system consists of the mercury target vessel, the mercury circulation system and the target trolley. The outline of the mercury target system and several topics appeared in the course of the system fabrication and assembling are reported. For the target vessel, the residual stress at the beam window was evaluated and it was confirmed that the stress level is low and no problem. For the mercury circulation system, 3D simulation and the remote handling simulation, also the mock-up test for the remote handling devices were carried out. These R&D activities will be reported.