Plasma lens for the focusing of positron bunches
Abstract
The development of effective focusing schemes for positron bunches in plasma accelerators remains a significant challenge, as nonlinear regimes fail to create stable focusing channels for positrons. This work presents a method for focusing and improving the quality of positron bunches using a plasma lens operating in the linear regime. Through numerical simulations, we investigate two distinct focused positron bunch profiles: a purely Gaussian bunch and an elongated, flat-top bunch with Gaussian rising and falling edges. For both configurations, the results demonstrate the capability to achieve high-quality transverse focusing. Furthermore, beyond focusing, the proposed system enables potential possibility to reduce energy spread of positron bunches of the sequence after precursor.
Keywords
Cite
@article{arxiv.2509.03225,
title = {Plasma lens for the focusing of positron bunches},
author = {D. S. Bondar and C. A. Lindstrøm and V. I. Maslov and I. N. Onishchenko},
journal= {arXiv preprint arXiv:2509.03225},
year = {2025}
}
Comments
5 pages, 8 figures