-Troll:
NETR. Neutrinos. These would succesfully pass through any substance like photons travel through glow. There ctype would tell what type of neutrino they are. For example (ELEC) would make it an electron neutrino. I suggest a new reaction where hydrogen turns into NBLE at high temperatures. When this happens neutrinos would be released. They would also be made by plutonium reacting and when a photon turns into a neutron.
The HYGN-NBLE reaction would break the new fusion in TPT. Neutrinos would have to be produced in the fusion we already have. BTW, I do see your point on protons, but I guess they just aren't useful enough, being that their main attraction(IMO) is making HYGN when combined with NEUT, among other smaller uses.
STILL, this is an epic idea.