FS-LA

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2018-10-25
13:52
OpenAccess [PUBDB-2018-03930] Journal Article
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An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
JoVE 140, e57055 () [10.3791/57055]  GO
This protocol describes key steps in performing and analyzing femtosecond pump-probe experiments that combine a femtosecond optical laser with a free-electron laser. This includes methods to establish the spatial and temporal overlap between the optical and free-electron laser pulses during the experiment, as well as important aspects of the data analysis, such as corrections for arrival time jitter, which are necessary to obtain high-quality pump-probe data sets with the best possible temporal resolution. [...]
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ddc:570
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2018-10-16
16:39
OpenAccess [PUBDB-2018-03813] Contribution to a conference proceedings
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SRF Gun Development at DESY
29th Linear Accelerator Cnference, LINAC18, BeijingBeijing, China, 17 Sep 2018 - 21 Sep 20182018-09-172018-09-21 Geneva : JACoW 20-24 () [10.3204/PUBDB-2018-03813]  GO
A future upgrade of the European XFEL (E-XFEL) foresees an additional CW operation mode, which will increase the flexibility in the photon beam time structure [1–3]. One of the challenges of this operational mode is the need fora CW operating photo injector. [...]
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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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ddc:540
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2018-05-28
12:49
OpenAccess [PUBDB-2018-02117] Contribution to a conference proceedings
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An Option to Generate Seeded FEL Radiation for FLASH1
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 4 pp. () [10.3204/PUBDB-2018-02117]  GO
The FLASH free-electron laser (FEL) at DESY is currently operated in self-amplified spontaneous emission (SASE) mode in both beamlines FLASH1 and FLASH2. Seeding offers unique properties for the FEL pulse, such as full coherence, spectral and temporal stability [...]
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2018-05-24
10:15
[PUBDB-2018-02086] Poster
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An Option to Generate Seeded FEL Radiation for FLASH1
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04
The FLASH free-electron laser (FEL) at DESY is currently operated in self-amplified spontaneous emission (SASE) mode in both beamlines FLASH1 and FLASH2. Seeding offers unique properties for the FEL pulse, such as full coherence, spectral and temporal stability. [...]

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2018-05-24
10:08
OpenAccess [PUBDB-2018-02084] Poster
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Control of FEL Radiation by Tailoring the Seed Pulses
9th International Particle Accelerator Conference (IPAC'18), IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
Seeded free-electron lasers (FELs) produce intense, ultrashort and fully coherent X-ray pulses. These seeded FEL pulses depend on the initial seed properties. [...]
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2018-05-15
17:22
OpenAccess [PUBDB-2018-01981] Contribution to a conference proceedings
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Status of the ARES RF Gun at SINBAD: From its Characterization and Installation Towards Commissioning
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04 3 pp. () [10.3204/PUBDB-2018-01981]  GO
The SINBAD facility (Short and INnovative Bunches and Accelerators at DESY) is foreseen to host multiple experiments relating to the production of ultra-short electron bunches and novel high gradient acceleration techniques. The SINBAD-ARES linac will be a conventional S-band linear RF accelerator allowing the production of low charge (0.5 pC - tens pC) ultra-short electron bunches (FWHM length ≤ fs - few fs) with 100 MeV energy. [...]
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2018-05-14
15:17
OpenAccess [PUBDB-2018-01956] Journal Article
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Time-resolved inner-shell photoelectron spectroscopy: From a bound molecule to an isolated atom
Due to its element and site specificity, inner-shell photoelectron spectroscopy is a widely used technique to probe the chemical structure of matter. Here, we show that time-resolved inner-shell photoelectron spectroscopy can be employed to observe ultrafast chemical reactions and the electronic response to the nuclear motion with high sensitivity. [...]
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ddc:530
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2018-03-29
13:22
[PUBDB-2018-01601] Contribution to a conference proceedings/Contribution to a book
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Operation of a seeded XUV free electron laser at DESY with high-gain harmonic generation seeding
Conference on Lasers and Electro-Optics : [Proceedings] - OSA Washington, D.C., 2017. - ISBN 978-1-943580-27-9 - doi:10.1364/CLEO_AT.2017.JTu4L.5
CLEO: Applications and Technology, CLEO 2017, San JoseSan Jose, California, 14 May 2017 - 19 May 20172017-05-142017-05-19
Washington, DC : OSA, OSA technical digest (online) JTu4L.5 () [10.1364/CLEO_AT.2017.JTu4L.5]  GO
The XUV free electron laser FLASH has been recently operated in the high-gain harmonic generation (HGHG) mode. We characterized the laser-induced energy modulation, as well as the temporal profile of the seeded FEL pulses. [...]

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2018-03-05
12:58
OpenAccess [PUBDB-2018-01375] Journal Article
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Near- and Extended-Edge X-Ray-Absorption Fine-Structure Spectroscopy Using Ultrafast Coherent High-Order Harmonic Supercontinua
Recent advances in high-order harmonic generation have made it possible to use a tabletop-scale setup to produce spatially and temporally coherent beams of light with bandwidth spanning 12 octaves, from the ultraviolet up to x-ray photon energies >1.6 keV. Here we demonstrate the use of this light for x-ray-absorption spectroscopy at the K- and L-absorption edges of solids at photon energies near 1 keV. [...]
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ddc:550
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