One of the most common accelerators, CRT, accelerating electrons at 30KV, 3mA current, we get 10^20 electrons/second at speeds of 0.3c(I computed this a long time ago, sorry if figures are not exact), hitting phosphorous material. It was a discussion about safety of astronauts in space when high energetic particles enter spacecraft. I suggested a similar system to CRT, to convert this energy to light and heat as it occurs in a CRT, I never got an answer when I asked if someone knows what will happen if electrons in CRT could be replaced with protons, I mean could there be a device that can effectively convert cosmic ray energies into useful light and heat energies or converting high energy matter to plasma and divert them by magnetic fields?
Obviously part of discussion concerned the damage to the spacecraft, but I think if the particles are small at relativistic speeds then the damage could be very small because a little hole in spacecraft could easily be repaired by automatic repair mechanism.
So questions are as follows:
1- How to convert high energetic cosmic rays or charged particles to useful heat and light?
2- How to convert neutral particles to plasma and divert them by magnetic/electric fields before they damage spacecraft?
3- How to have an automatic repair mechanism to repair holes, similar to cell repair mechanism?