Aye, you can also get additional proof by placing different thicknesses of attenuators (parrafin wax works well for this) between your neutron counter and the f

Aye, you can also get additional proof by placing different thicknesses of attenuators (parrafin wax works well for this) between your neutron counter and the fusion device to demonstrate that the energy of the neutrons is commensurate with the energy from a D+D reaction. Borax is cheap and helpful for shielding if you start getting more neutrons than is comfortable. Neutrons are a serious radiation hazard but most fusors would be happy to get into the dangerous range.