High‐flux neutron source for fusion studies

In all of the fusion reactors currently under active consideration, an intense flux of 14‐MeV neutrons will bombard the inner walls of the reactor. One expects a 14‐MeV neutron flux of about $1014/cm2 sec.$ This is an order of magnitude below the typical flux in fission power reactors, but the much more energetic neutrons from the deuterium–tritium fusion reaction can generate significantly different kinds of damage to the materials of the reactor.