International Collaboration on Advanced Neutron Sources

As an upgrade of ISIS facility, the next generation spallation neutron source is under consideration. One of option as a proton drive is based on a Fixed Field Alternating Gradient Accelerator (FFA). We are planning the construction of a prototype FFA which accelerates from 3 MeV to 12 MeV to prove the merits of this option. Although the energy range is much lower than the final goal, the...

The 3-GeV rapid cycling synchrotron at the Japan Pro-ton Accelerator Research Complex was designed to pro-vide 1-MW proton beams to the following facilities. Thanks to the improvement works of the accelerator sys-tem, we successfully accelerate 1-MW beam with quite small beam loss. Currently, the beam power of RCS is limited by the lack of anode current in the RF cavity system rather than the...

A compression of the 5 MW ESS proton pulse from the present 2.86 milliseconds to a medium pulse length of a few tens of microseconds which is better matched to the moderator time-constant of thermal and cold neutrons would considerably boost the performance for many instruments at ESS. A pulse of a few tens of microseconds can most likely be handled by the ESS target with some minor...

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