发表机构
SLAC National Accelerator Laboratory; Deutsches Elektronen-Synchroton DESY; Department of Physics, University of Oslo（斯坦福直线加速器中心; 德国电子同步加速器; 奥斯陆大学物理系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究探讨在温等离子体柱中通过电子能量回收束提升正电子加速效率，发现高阶电离与离子运动限制了尾场残余能量的进一步提取。
AI 中文摘要
束流驱动的等离子体尾场加速（PWFA）是实现未来直线对撞机的有前景候选方案，这得益于等离子体中产生的极高场梯度。尽管近年来在高梯度和高效率电子PWFA方面取得了成功，但高效正电子PWFA仍然是一个挑战。温等离子体柱机制在等离子体电子细丝中提供稳定、高质量的正电子束加速，尽管能量转移效率较低。我们探索了利用电子能量回收束从等离子体尾场中提取残余能量并提高该方案效率的可能性。我们的粒子网格模拟揭示，某些机制，包括高阶电离和离子运动，限制了我们进一步从等离子体尾场提取能量的能力。
英文摘要
Beam-driven plasma wakefield acceleration (PWFA) is a promising candidate for realizing a future linear collider, owing to the extremely high field gradients that are produced in plasmas. Despite recent success in high-gradient and high-efficiency electron PWFA, efficient positron PWFA remains a challenge. The warm plasma column regime offers stable, high-quality acceleration of positron beams in a plasma electron filament, albeit at low energy-transfer efficiencies. We explore the possibility of employing an electron energy recovery beam to extract residual energy from the plasma wakefield and increase the efficiency of this scheme. Our particle-in-cell simulations reveal that certain mechanisms, including higher-order ionization and ion motion, limit our ability to further extract energy from the plasma wakefield.
Comments6 pages, 6 figures
