Fig. 3-7

Layout of the spallation target system and structure of the cold moderator When a high energy proton beam strikes the mercury target, high intensity neutrons are generated by spallation reactions. The moderators divide the neutrons into several energy levels so as to utilize them in neutron scattering experiments. In particular, a cold moderator using supercritical hydrogen is necessary to make the moderator vessel's shape flat like a lunch box while realizing high neutronic performance and suppressing the hydrogen temperature rise.

Go back by your web browser, or click the right button.

Persistent Quest - Research Activities 2000 Copyright(c) Japan Atomic Energy Research Institute