Figure 3
Simulated neutron energy spectra, with intensities normalised to units of n/cm2/s⋅μA in reference to the deuteron beam current. Binning of the histograms is according to the CCFE-709 energy-group structure. (a) The source without shielding and moderation in place, for a 2.8 MeV deuterium beam. The influence of the forward momentum of the beam can clearly be seen in the increased neutron flux and neutron energy in the forward direction. (b) At the exit of each of the three neutron-extraction ports