Stable Positron Acceleration in Thin, Warm, Hollow Plasma Channels

TL;DR

This paper demonstrates that thin, warm hollow plasma channels can sustain large plasma waves suitable for high-quality positron acceleration, overcoming instabilities and enabling stable beam focusing.

Contribution

It introduces the concept that warm, thin hollow plasma channels can enable stable positron acceleration and self-consistently form during plasma dynamics, advancing plasma-based accelerator technology.

Findings

Warm electrons and thin hollow channels enable positron focusing wakefields.

Such channels can sustain large-amplitude plasma waves for acceleration.

Channels emerge self-consistently during plasma dynamics.

Abstract

Hollow plasma channels are attractive for lepton acceleration because they provide intrinsic emittance preservation regimes. However, beam breakup instabilities dominate the dynamics. Here, we show that thin, warm hollow channels can sustain large-amplitude plasma waves ready for high-quality positron acceleration. We verify that the combination of warm electrons and thin hollow channel enables positron focusing structures. Such focusing wakefields unlock beam breakup damping mechanisms. We demonstrate that such channels emerge self-consistently during the long-term plasma dynamics in the blowout's regime aftermath, allowing for experimental demonstration.