  We propose a setup for positron acceleration consisting of an electron driver
and a laser pulse creating a two-fold plasma column structure. The resulting
wakefield is capable of accelerating positron bunches over long distances even
when evolution of the driver is considered. The scheme is studied by means of
particle-in-cell simulations. Further, the analytical expression for the
accelerating and focusing fields are obtained, showing the equilibrium lines
along which the witness bunch is accelerated.
