Speaker
Description
SwissFEL, the free-electron laser facility at the Paul Scherrer Institute (PSI) in Switzerland, is about to complete its first decade of user operation. The knowledge gained during this period, together with important developments at FEL facilities worldwide, suggests a number of key upgrades to the accelerator and undulator complex that would substantially enhance the scientific capabilities of the two existing SwissFEL beamlines. The SwissFELplus project, planned for 2029-2032, aims to implement these upgrades - including full coherence in the hard- and soft-X-ray regimes via self- and external-laser seeding, as well as preparations for a new beamline - and thereby bring SwissFEL to a new level of scientific excellence ahead of its quantitative expansion with a third beamline. The resulting improvements in beam stability and coherence will benefit applications ranging from atomic physics to biology and will enable new approaches, such as quantum optics for X-rays, with its advantages in the management of radiation damage. This contribution describes the upgrade elements and their expected impact on SwissFEL’s photon-science capabilities.
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