FS-FLASH-B

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2018-11-13
16:52
[PUBDB-2018-04481] Journal Article
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Damage accumulation in thin ruthenium films induced by repetitive exposure to femtosecond XUV pulses below the single-shot ablation threshold
ddc:620
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2018-11-01
16:28
OpenAccess [PUBDB-2018-04108] Journal Article
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Double-grating monochromatic beamline with ultrafast response for FLASH2 at DESY
The preliminary design of a monochromatic beamline for FLASH2 at DESY is presented. The monochromator is tunable in the 50–1000 eV energy range with resolving power higher than 1000 and temporal response below 50 fs over the whole energy range [...]
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ddc:550
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2018-09-28
11:53
OpenAccess [PUBDB-2018-03672] Journal Article
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Mechanism of single-shot damage of Ru thin films irradiated by femtosecond extreme UV free-electron laser
Optics express 26(15), 19665 - 19685 () [10.1364/OE.26.019665]  GO
Ruthenium is a perspective material to be used for XUV mirrors at free-electron laser facilities. Yet, it is still poorly studied in the context of ultrafast laser-matter interaction. [...]
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ddc:530
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2018-08-30
10:18
OpenAccess [PUBDB-2018-03255] Journal Article
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XUV double-pulses with femtosecond to 650 ps separation from a multilayer-mirror-based split-and-delay unit at FLASH
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 [...]
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ddc:540
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2018-08-20
14:27
OpenAccess [PUBDB-2018-03069] Journal Article
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CAMP@FLASH: an end-station for imaging, electron- and ion-spectroscopy, and pump–probe experiments at the FLASH free-electron laser
The non-monochromatic beamline BL1 at the FLASH free-electron laser facility at DESY was upgraded with new transport and focusing optics, and a new permanent end-station, CAMP, was installed. This multi-purpose instrument is optimized for electron- and ion-spectroscopy, imaging and pump–probe experiments at free-electron lasers [...]
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2018-01-11
16:57
OpenAccess [PUBDB-2018-00563] Journal Article
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Probing ultra-fast processes with high dynamic range at 4th-generation light sources: Arrival time and intensity binning at unprecedented repetition rates
Structural dynamics 4(2), 024301 - () [10.1063/1.4978042]  GO
Understanding dynamics on ultrafast timescales enables unique and new insights into important processes in the materials and life sciences. In this respect, the fundamental pump-probe approach based on ultra-short photon pulses aims at the creation of stroboscopic movies [...]
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2017-12-22
14:02
OpenAccess [PUBDB-2017-14060] Journal Article
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Experimental study of EUV mirror radiation damage resistance under long-term free-electron laser exposures below the single-shot damage threshold
The durability of grazing- and normal-incidence optical coatings has been experimentally assessed under free-electron laser irradiation at various numbers of pulses up to 16 million shots and various fluence levels below 10% of the single-shot damage threshold. The experiment was performed at FLASH, the Free-electron LASer in Hamburg, using 13.5 nm extreme UV (EUV) radiation with 100 fs pulse duration. [...]
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2017-12-19
11:10
OpenAccess [PUBDB-2017-13688] Journal Article/Contribution to a conference proceedings/Contribution to a book
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A soft x-ray split-and-delay unit for FLASH II
: [Proceedings] - , 2017. - doi:10.1117/12.2265708
Advances in X-ray Free-Electron Lasers Instrumentation IV, PraguePrague, Czech Republic, 24 Apr 2017 - 27 Apr 20172017-04-242017-04-27
Proceedings of SPIE 10237, 1023712 () [10.1117/12.2265708]  GO
For the soft x-ray free-electron laser FLASH II at DESY in Hamburg a new split-and-delay unit (SDU) is built for photon energies in the range of 30 eV < hν < 1500 eV with an option to expand this range to hν = 2500 eV. The SDU is based on wavefront beam splitting at grazing incidence angles. [...]
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2017-12-11
14:25
OpenAccess [PUBDB-2017-13262] Journal Article
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THz pulse doubler at FLASH: double pulses for pump–probe experiments at X-ray FELs
FLASH, the X-ray free-electron laser in Hamburg, Germany, employs anarrowband high-field accelerator THz source for unique THz pump X-rayprobe experiments. However, the large difference in optical paths of the THzand X-ray beamlines prevents utilization of the machine’s full potential (e.g.extreme pulse energies in the soft X-ray range). [...]
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2017-12-07
14:09
OpenAccess [PUBDB-2017-12877] Journal Article/Contribution to a conference proceedings/Contribution to a book
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Grating monochromator with ultrafast response for FLASH2 at DESY
[Proceedings] - , 2017. - ISBN - doi:10.1117/12.2264885
Advances in X-ray Free-Electron Lasers Instrumentation IV, PraguePrague, Czech Republic, 24 Apr 2017 - 27 Apr 20172017-04-242017-04-27
Proceedings of SPIE 10237, 1023716 () [10.1117/12.2264885]  GO
We discuss the design of grating-based monochromators for coherent ultrafast pulses in the extreme-ultraviolet. The main application of such instruments is the monochromatization of ultrafast high-order laser harmonics and freeelectron-laser pulses. [...]
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