2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83535In the presence of an external magnetic field, wake fields generated by a short laser pulse can propagate out of the plasma, and thereby provide information about the electron density profile. A method for reconstructing the density profile from a measured wake field spectrum is proposed and a numerical example is given. Finally, we compare our proposal with existing plasma density diagnostic techniques.5 pages, 2 figuresPlasma Physicstext