High power cyclotron complex for neutron production

The requirements to power of the accelerated proton beam to drive subcritical electronuclear assembly are considered. In the unique in the world high current cyclotron complex PSI the proton beam with average power 1.2 MW is obtained and the technical opportunities for production of the beam with power 1.8 MW are considered now, that is planned to achieve in 2012. The PSI cyclotron facility consists of 800 keV preinjector, 72 MeV cyclotron injector and the 590 MeV ring cyclotron. Now the cyclotron seems as the most suitable accelerator for production of proton beams with power up to 10 MW. There are some offers on creation of such complexes; all of them have common properties. A full cycle of acceleration consists of three stages: high-voltage injection with bunching of continuous beam, then preliminary acceleration in the four-sector cyclotron and acceleration up to the maximal energy 600-800 MeV in the ring cyclotron with six or more sectors. At the first stage of acceleration instead of high-voltage injection one can use the parallel work of two cyclotrons with injection in the subsequent cascade of a beam of the double intensity