Integration of PWFA into the UK XFEL

等离子体尾迹加速开辟了一条通过等离子体光电阴极机制产生超亮电子束的途径。超亮电子束反过来又是英国XFEL非常受欢迎的。学员将研究使用英国X-FEL电子束交替/随后驱动PWFA-FEL附加/加力燃烧室的可能性。这可能是在一个专门的研究线路和站点，也可能是在基于传统技术的X-FEL产生过程结束后：驱动今天X-FEL的电子束在波荡器通过后保持其大部分能量/功率。因此，它们也可以用来驱动第二个波动器，就像在汉堡X-FEL所做的那样，和/或然后被倾倒。或者，它们也可以用来驱动PWFA-FEL级，而不是丢弃电子束。另一项与此相关的任务是：你能用来自混合激光-等离子体-加速器的电子束驱动自由电子激光器吗？该项目旨在全面研究这些现象，包括对等离子体尾场阶段、束流传输阶段和自由电子激光阶段的模拟，并与STFC PWFA-FEL项目相联系。

Plasma wakefield acceleration opens a pathway to produce ultrabright electron beams via the plasma photocathode mechanism. Ultrabright electron beams, in turn are highly desirable for the UK XFEL. The studentship shall investigate the potential of using the UK X-FEL electron beam to alternatively/subsequently drive a PWFA-FEL add-on/afterburner. This could be either in a dedicated research line and station, or after the conventional technology-based X-FEL generation process is concluded: The electron beams which drive today's X-FELs retain much of their energy/power after an undulator pass. They can therefore be used also to drive a second undulator, as is done at the Hamburg X-FEL, and/or are then dumped. Alternativey, instead of dumping the beams, they could also be used to drive a PWFA-FEL stage.Another task is related to this: can you drive an FEL with electron beams from hybrid laser-plasma-accelerators? The studentship aims at comprehensive investigation of these phenomena, including simulations of the plasma wakefield stage, the beam transport stage, and the FEL stage, and is linked to the STFC PWFA-FEL project.