Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex, 1; Pulsed spallation neutron source

Takada, Hiroshi   ; Haga, Katsuhiro  ; Teshigawara, Makoto   ; Aso, Tomokazu ; Meigo, Shinichiro   ; Kogawa, Hiroyuki  ; Naoe, Takashi   ; Wakui, Takashi  ; Oi, Motoki ; Harada, Masahide   ; Futakawa, Masatoshi  

At the Japan Proton Accelerator Research Complex (J-PARC), a pulsed spallation neutron source provides neutrons with high intensity and narrow pulse width to promote researches on a variety of science in the Materials and life science experimental facility. It was designed to be driven by the proton beam with an energy of 3 GeV, a power of 1 MW at a repetition rate of 25 Hz, that is world's highest power level. A mercury target and three types of liquid para-hydrogen moderators are core components of the spallation neutron source. It is still on the way towards the goal to accomplish the operation with a 1 MW proton beam. In this paper, distinctive features of the target-moderator-reflector system of the pulsed spallation neutron source are reviewed.