Proton beam fusion beam propagation and indirect-driven-target

In order to delete the unneutralised charge at the leading edge of the propagating proton beam, the simultaneous launching of electron beam is proposed here. If the electron-beam-current exceeds the proton beam current by 50kA, the cooling of proton beam will be achieved in the region of beam-convergence. The cool proton beam can propagate in the plasma channel. The indirect-driven-target can release enough fusion-out put-energy in spite of the nonuniform beam irradiation.