High-Efficiency Wakefield Acceleration of Positrons via a Slit Plasma Channel
Abstract
Although plasma-based wakefield acceleration has achieved remarkable success for electrons, efficient positron acceleration remains a long standing challenge, as positrons suffer severe defocusing in the accelerating phases of such structures. Here, we propose a slit plasma wakefield acceleration (SPWA) scheme, in which a relativistic electron beam propagating through a slit channel formed by two parallel plasma slabs excites crossing plasma-electron filamentary structures within the slit, generating intense wakefields tailored to simultaneously provide longitudinal acceleration and transverse focusing for a trailing positron bunch. A theoretical model is developed to characterize the wakefield structure responsible for positron acceleration and focusing. Three-dimensional particle-in-cell simulations validate the model, and demonstrate that the SPWA scheme achieves a positron trapping efficiency of nearly 100%, while maintaining low emittance growth and narrow energy spread for an injected positron beam. These findings establish a new and robust approach to high-efficiency positron acceleration, with promising implications for future compact electron-positron colliders and high-energy positron applications.
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BibTeX
@misc{wang2026highefficiency,
title = {{High-Efficiency Wakefield Acceleration of Positrons via a Slit Plasma Channel}},
author = {Yu-Jie Wang and Xing-Long Zhu and Hong-Kang Zuo and Zheng-Ming Sheng},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.04261},
eprint = {2611.04261},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.04261},
}
RIS
TY - UNPB
TI - High-Efficiency Wakefield Acceleration of Positrons via a Slit Plasma Channel
AU - Yu-Jie Wang
AU - Xing-Long Zhu
AU - Hong-Kang Zuo
AU - Zheng-Ming Sheng
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.04261
UR - https://arxiv.org/abs/2611.04261
AB - Although plasma-based wakefield acceleration has achieved remarkable success for electrons, efficient positron acceleration remains a long standing challenge, as positrons suffer severe defocusing in the accelerating phases of such structures. Here, we propose a slit plasma wakefield acceleration (SPWA) scheme, in which a relativistic electron beam propagating through a slit channel formed by two parallel plasma slabs excites crossing plasma-electron filamentary structures within the slit, generating intense wakefields tailored to simultaneously provide longitudinal acceleration and transverse focusing for a trailing positron bunch. A theoretical model is developed to characterize the wakefield structure responsible for positron acceleration and focusing. Three-dimensional particle-in-cell simulations validate the model, and demonstrate that the SPWA scheme achieves a positron trapping efficiency of nearly 100%, while maintaining low emittance growth and narrow energy spread for an injected positron beam. These findings establish a new and robust approach to high-efficiency positron acceleration, with promising implications for future compact electron-positron colliders and high-energy positron applications.
ER -