Could it be possible ( using a reasonable amount of energy and ressources ) to capture protons from solar wind on (ex. the moon) in order to produce water for a long term self-sufficient mission. The amount of water should compensate for system losses.
You are free to make assumptions and improve my question as english is not my native language
EDIT: Assuming a proton flux of 2e12 m^-2 s as provided here (https://astronomy.stackexchange.com/questions/18829/composition-and-proton-flux-from-the-solar-wind) we would need to capture an area of 10^6 m^2 in order to get 0.11kg of protons per year ( the mass required to make 1 liter of water )