Hi, Rossi seems to think the Compton wavelength of the electron is important, and Proton21 uses 600 keV electrons. Perhaps 511 keV is the minimal energy needed by an electron to convert a proton into an anti-proton (pair -production??).
If so then the theoretical maximum energy gain per reaction is a factor of 2 x (mass of proton) / (mass of electron) = 3672. That ought to be enough to cover conversion inefficiencies. ;) It also has the great advantage that a star ship wouldn't need to carry around massive amounts of dangerous anti-matter, but rather could make what they need on-the-fly from ordinary matter. In fact they may even be able to harvest hydrogen from interstellar space to use as fuel, ensuring that the initial fuel load would only need to be sufficient to get them up to a speed where they can collect it as fast as they use it. Combine this with a reactionless drive, and one has a near light speed capability to reach the stars. :) Regards, Robin van Spaandonk local asymmetry = temporary success
