Abstract
At the Japan Proton Accelerator Research Complex (J-PARC), a pulsed spallation neutron source provides neutrons with high intensity and narrow pulse width pulse to promote researches on a variety of science in the Materials and Life Science Experimental Facility (MLF). It was designed to be driven by a 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. It is still on the way towards the goal to accomplish the operation with a 1 MW proton beam. In this review, distinctive features of the target-moderator-reflector system of the pulsed spallation neutron source are presented.
Highlights
The Japan Proton Accelerator Research Complex (J-PARC) is a multi-purpose research facility complex consisting of 3 accelerators and 4 experimental facilities
This article focuses on designs of the mercury target system, the moderators and the cryogenic hydrogen system are focused
The hydrogen circulation system circulates the cryogenic hydrogen through the three moderators and removes the heat generated in the moderator
Summary
The Japan Proton Accelerator Research Complex (J-PARC) is a multi-purpose research facility complex consisting of 3 accelerators and 4 experimental facilities. A mercury-target-moderator-reflector system was designed carefully in view of maximizing the intensity of neutrons and making the pulse shape as narrow as possible. The target, moderators and reflector are highly damaged by a high-power operation at 1 MW They must be replaced by full remote-controlled tools before the estimated end of lifetime. This article focuses on designs of the mercury target system, the moderators and the cryogenic hydrogen system are focused. This article focuses on designs of the mercury target system, the moderators and the cryogenic hQyuadnrtuomgeBneamsySscti.e2m017a,r1e, 8focused
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