2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86579We point out that even the most intense laser beams available today can provide only a very small fraction of the beam energy required to reach the design luminosity for a future e+e- linear collider. This fact seems to have been overlooked in the extensive literature on laser acceleration of charged particles.Accelerator Physicstext