STATUS OF THE sFLASH UNDULATOR SYSTEM

A seeded free-electron laser (FEL) experiment at VUV wavelengths, called sFLASH, is being prepared at the existing SASE FEL user facility FLASH [1, 2, 3, 4]. Seed pulses at wavelengths around 30 nm from high harmonic generation (HHG) will interact with the electron beam in sFLASH undulators upstream of the existing SASE undulator section. In this paper the status of sFLASH undulators are reported.