Stable electron beam propagation in a plasma column

The stability of plasma-based accelerators against transverse misalignments and asymmetries the drive beam is crucial for their applicability. Without stabilizing mechanisms, even small initial offsets centroid can couple coherently to plasma wake, grow, ultimately lead emittance degradation or loss a trailing witness beam. In this work, we demonstrate intrinsic propagating in column. This result relevant context positron acceleration, where wakefield suitable transport acceleration generated column by means an electron stable propagation necessary condition experimental implementation scheme. differences similarities mechanisms compared homogeneous are identified via theory particle-in-cell simulations. Experimental tolerances given, demonstrating feasibility