A diffuser for a turbine engine that includes two annular webs extending inside one another and connected between them by substantially radial vanes, wherein the downstream peripheral edge of at least one of the webs includes indentions evenly distributed about the longitudinal axis of the diffuser. The draw furnace defines an exit opening at the second end and a furnace passage extending between the first and second ends. The first mating end is configured for coupling an electrical connector. As a result, it is possible to ensure a cooling air flow between the rotor iron core and the stator iron core without enlarging the rotor.