We propose and we numerically design a working point for beam driven plasma wakefield acceleration that allows to preserve the witness quality. This working point is a new scheme where a low density driver generates a wakefield in linear regime and the witness transverse evolution is dominated by the beam loading effect. We derived optimal matching conditions to prevent the phase space degradation by means of transverse envelope equation.

中文翻译：

---

光束加载辅助匹配方案可实现线性状态下的高质量等离子体加速

我们提出并在数值上设计了波束驱动的等离子尾波加速的工作点，该工作点可保持见证人的素质。此工作点是一种新方案，其中低密度驱动器在线性状态下生成尾流场，并且见证横向扩展受束负载效应支配。我们通过横向包络方程推导了最佳匹配条件，以防止相空间退化。