Beam based undulator trajectory alignment at European XFEL
arXiv:2607.11407
summary
The paper describes a combined electron‑ and photon‑beam method with step‑by‑step performance optimization to align the 250 m long undulator trajectory at the European XFEL onto a straight line for reliable SASE and advanced operation modes.
Abstract
Precise alignment of the undulator trajectory onto a straight line is a per-requisite for high fidelity SASE operation, which in turn also enables non-standard operation modes like self-seeding or two-color operation. At European XFEL electron and photon beam-based method are combined with a step-by-step performance-based optimization to ensure that the trajectory is on a straight line over most of the length of the about 250 m long undulator system.
Topics & keywords
#undulator alignment#electron beam trajectory#XFEL#SASE operation#self‑seeding#two‑color operationundulatortrajectory alignmentbeam‑based methodstep‑by‑step optimizationEuropean XFEL