Neutron beams are produced by nuclear reaction with a 50 MeV deuterons beam on a beryllium target.
A filter behind the target removes the low energy neutrons, the charged particles and most of the gammas rays.
The result is a continuous neutrons energy spectrum centered on 23 MeV.
As the neutron beam is a cone behind the beryllium target, its size is function of the distance between the DUT and the beryllium target.
The neutron flux depends on the distance and the beam intensity. Flux of 3E9 neutrons/(s.cm²) can be reached with an ±10% homogeneity on a diameter of 8 cm.
