State-of-the-art of the neutron source complex construction on the basis at the LUEh-300 accelerator

Upgrading of the 300 MeV linear accelerator (LUEh-3000) in order to create on its base highly intensive pulse source and fast neutron spectrometer is described in short. Upgrading offers an increase of mean beam current at an outlet up to 15-20/μA. Present and designed electron beam parameters are presented. Arrangement of the injector, accelerating system, SHF-supply system, beam transport, and also of the time-of-flight neutron spectrometer is described. An assembly of tantalum plates with a total thickness of 10 radiation lenghts producing the fast neutron flux of 1012 neutr/s is chosen as a target. After ugrading it will be possible to use the accelerator in nano- and microsecond current pulse duration ranges under the condition of minimum time expenses on rearrangement of its operation regimes