XUV double-pulses with femtosecond to 650 picoseconds separation from a multilayer mirror based split-and-delay unit at FLASH
Monserud, Nils C.
Müller, Jan P.
- Journal Article
Rights / licenseIn Copyright - Non-Commercial Use Permitted
Extreme ultraviolet (XUV) and X-ray free-electron lasers enable new scientific opportunities. Their ultra-intense coherent femtosecond pulses give unprecedented access to the structure of undepositable nanoscale objects and to transient states of highly excited matter. In order to probe the ultrafast complex light-induced dynamics on the relevant time scales, the multi-purpose end-station CAMP at the free-electron laser FLASH has been complemented by the novel multilayer-mirror-based split-and-delay unit DESC (DElay Stage for CAMP) for time-resolved experiments. XUV double-pulses with delays adjustable from zero femtoseconds up to 650 picoseconds are generated by reflecting under near-normal incidence, exceeding the time range accessible with existing XUV split-and-delay units. Procedures to establish temporal and spatial overlap of the two pulses in CAMP are presented, with emphasis on the optimization of the spatial overlap at long time-delays via time-dependent features, for example in ion spectra of atomic clusters. Show more
Journal / seriesJournal of Synchrotron Radiation
Pages / Article No.
SubjectSplit-and-delay unit; Free-electron laser; Pump-probe; Multilayer mirror; Temporal and spatial overlap
Organisational unit09668 - Rupp, Daniela / Rupp, Daniela
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