Self-stabilizing positron acceleration in a plasma column

Plasma accelerators sustain extreme field gradients and potentially enable future compact linear colliders. Although tremendous progress has been achieved in accelerating electron beams a plasma accelerator, positron acceleration with collider-relevant parameters is challenging. A recently proposed scheme relying on the wake generated by an drive beam column shown to be able accelerate witness low emittance energy spread. However, since this relies cylindrical symmetry, it possibly prone transverse instabilities that could lead, ultimately, breakup. In article, we show itself subject various damping mechanisms and, therefore, inherently stable toward misalignment of beams. This enables stable, high-quality plasma-based acceleration.