标题： 驱动等离子体波加速器的自由电子激光器的传输和匹配线研究 显示英文标题

标题： Study of the transfer and matching line for a PWFA-driven FEL

摘要： 紧凑加速设施的发展，提供高亮度束流，是下一代紧凑且成本低廉粒子加速器领域中最具挑战性的任务之一。 最近在SPARC\_LAB获得的结果显示，通过一个紧凑（3厘米）的粒子驱动等离子体基加速器，证实了FEL激光器。 这项工作是在SPARC\_LAB关于R$\&$D的活动框架内进行的，旨在实现新型紧凑等离子体基设施，即EuPRAXIA@SPARC\_LAB。 本文提出的工作是一项理论研究，展示了实施一种创新放电毛细管阵列的可能方案，该阵列作为有源等离子透镜运行，并有一个光阑，以构建从等离子体加速模块输出的束流的非传统传输线。 利用有源等离子透镜提供的对称和线性聚焦，见证束被捕捉并沿阵列传输，而不会影响其在等离子体模块出口处的质量。 同时，由于驱动束在同一阵列中过度聚焦，可以通过光阑将其移除。 显示英文摘要

摘要： The development of compact accelerator facilities providing high-brightness beams is one of the most challenging tasks in the field of next-generation compact and cost affordable particle accelerators. Recent results obtained at SPARC\_LAB show evidence of the FEL laser by a compact (3 cm) particle driven plasma-based accelerator. This work is carried out in the framework of the SPARC\_LAB activities concerning the R$\&$D on plasma wakefield accelerators for the realization of new compact plasma based facilities, i.e EuPRAXIA@SPARC\_LAB. The work here presented is a theoretical study demonstrating a possible scheme concerning the implementation of an innovative array of discharge capillaries, operating as active-plasma lenses, and one collimator to build an unconventional transport line for bunches outgoing from plasma accelerating module. Taking advantage of the symmetric and linear focusing provided by an active-plasma lens, the witness is captured and transported along the array without affecting its quality at the exit of the plasma module. At the same time the driver, being over-focused in the same array, can be removed by means of a collimator.