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XUV double-pulses with femtosecond to 650 ps separation from a multilayer-mirror-based split-and-delay unit at FLASH

Authors :
Christopher Passow
Julian Zimmermann
Rebecca Boll
Christoph Bostedt
Cédric Bomme
Leonie Flückiger
Thomas Möller
Bruno Langbehn
Kaja Schubert
Nils Monserud
Erland Müller
Daniel Rolles
Sadia Bari
Anatoli Ulmer
Simon Dörner
Dimitrios Rompotis
Björn Senfftleben
Rolf Treusch
Tobias Bischoff
Mario Sauppe
Lucas Schwob
Daniela Rupp
Stefan Düsterer
Jannis Zimbalski
Holger Weigelt
Katharina Kolatzki
Torsten Feigl
Daniel Ramm
Tais Gorkhover
Jan P. Müller
Benjamin Erk
Source :
Journal of Synchrotron Radiation, Journal of synchrotron radiation 25(5), 1517-1528 (2018). doi:10.1107/S1600577518006094, Journal of Synchrotron Radiation, 25 (Part 5)
Publication Year :
2018

Abstract

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.

Details

ISSN :
16005775
Database :
OpenAIRE
Journal :
Journal of Synchrotron Radiation
Accession number :
edsair.doi.dedup.....9e60d9ada4ce6e8d5a954942b60f2bca
Full Text :
https://doi.org/10.1107/s1600577518006094