FS-LA

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2017-09-13
16:13
OpenAccess [PUBDB-2017-10736] Contribution to a conference proceedings/Contribution to a book
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Concept for a Seeded FEL at FLASH2
8th Intl. Particle Accelerator Conference, IPAC2017, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19
Geneva : JACoW, 2607-2610 (2017) [10.18429/JACoW-IPAC2017-WEPAB019]  GO
The free-electron laser (FEL) FLASH is a user facility delivering photon pulses down to 4 nm wavelength. Recently, the second FEL undulator beamline FLASH2 was added to the facility. [...]
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2017-08-09
15:15
OpenAccess [PUBDB-2017-09033] Journal Article
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Single-shot Monitoring of Ultrafast Processes via X-ray Streaking at a Free Electron Laser
ddc:000
The advent of x-ray free electron lasers has extended the unique capabilities of resonant x-ray spectroscopy techniques to ultrafast time scales. Here, we report on a novel experimental method that allows retrieving with a single x-ray pulse the time evolution of an ultrafast process, not only at a few discrete time delays, but continuously over an extended time window [...]
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2017-07-13
16:21
OpenAccess [PUBDB-2017-07579] Preprint/Report
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Alignment, Orientation, and Coulomb Explosion of Difluoroiodobenzene Studied with the Pixel Imaging Mass Spectrometry (PImMS) Camera
[arXiv:1706.08376] ddc:540
Laser-induced adiabatic alignment and mixed-field orientation of 2,6-difluoroiodobenzene (C$_6$H$_3$F$_2$I) molecules are probed by Coulomb explosion imaging following either near-infrared strong-field ionization or extreme-ultraviolet multi-photon inner-shell ionization using free-electron laser pulses. The resulting photoelectrons and fragment ions are captured by a double-sided velocity map imaging spectrometer and projected onto two position-sensitive detectors. [...]
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2017-06-23
11:17
OpenAccess [PUBDB-2017-05953] Contribution to a conference proceedings/Contribution to a book
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Towards a Fully Integrated Accelerator on a Chip: Dielectric Laser Acceleration (DLA) From the Source to Relativistic Electrons
8th International Particle Accelerator Conference, IPAC 2017, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 20172017-05-142017-05-19
JACoW, Geneva, Switzerland, 2520-2525 (2017) [10.18429/JACoW-IPAC2017-WEYB1]  GO
Dielectric laser acceleration of electrons has recently been demonstrated with significantly higher accelerating gradients than other structure-based linear accelerators. Towards the development of an integrated 1 MeV electron accelerator based on dielectric laser accelerator technologies, development in several relevant technologies is needed. [...]
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2017-06-19
15:04
OpenAccess [PUBDB-2017-05466] Master Thesis
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Passively mode-locked holmium-doped soliton fiber ring oscillator
82 p. (2017) [10.3204/PUBDB-2017-05466] = HAWK Hochschule für angewandte Wissenschaft und Kunst Hildesheim/Holzminden/Göttingen, Masterarbeit, 2017  GO
Ultrashort laser pulses are used in physical analysis techniques as well as in materials processing and are generated in passively mode-locked oscillators. However, those oscillators produce low pulse energies, but can be used as seeding sources for regenerative amplifiers. [...]
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2017-05-23
08:04
OpenAccess [PUBDB-2017-03389] Master Thesis
; ;
Passively mode-locked holmium-doped soliton fiber ring oscillator
82 p. (2017) [10.3204/PUBDB-2017-03389] = Hochschule für angewandte Wissenschaft und Kunst Hildesheim/Holzminden/Göttingen, Masterarbeit, 2017  GO
Ultrashort laser pulses are used in physical analysis techniques as well as in materials processing and are generated in passively mode-locked oscillators. However, those oscillators produce low pulse energies, but can be used as seeding sources for regenerative amplifiers. [...]
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2017-05-10
10:10
OpenAccess [PUBDB-2017-02555] Report/Journal Article
; ; ; et al
Alignment, orientation, and Coulomb explosion of difluoroiodobenzene studied with the pixel imaging mass spectrometry (PImMS) camera
[arXiv:1706.08376] ddc:540
Laser-induced adiabatic alignment and mixed-field orientation of 2,6-difluoroiodobenzene (C$_6$H$_3$F$_2$I) molecules are probed by Coulomb explosion imaging following either near-infrared strong-field ionization or extreme-ultraviolet multi-photon inner-shell ionization using free-electron laser pulses. The resulting photoelectrons and fragment ions are captured by a double-sided velocity map imaging spectrometer and projected onto two position-sensitive detectors. [...]
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2017-04-12
10:21
OpenAccess [PUBDB-2017-01661] Journal Article
; ; ; et al
Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser
ddc:530
In pump-probe experiments employing a free-electron laser (FEL) in combination with a synchronized optical femtosecond laser, the arrival-time jitter between the FEL pulse and the optical laser pulse often severely limits the temporal resolution that can be achieved. Here, we present a pump-probe experiment on the UV-induced dissociation of 2,6-difluoroiodobenzene $(C_{6}H_{3}F_{2}I)$ molecules performed at the FLASH FEL that takes advantage of recent upgrades of the FLASH timing and synchronization system to obtain high-quality data that are not limited by the FEL arrival-time jitter. [...]
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2017-04-06
08:33
OpenAccess [PUBDB-2017-01527] Journal Article
; ; ; et al
Study on laser characteristics of Ho:YLF regenerative ampliers: Operation regimes, gain dynamics, and highly stable operation points
ddc:530
We present a comprehensive study of laser pulse amplification of Ho:YLF regenerative amplifiers (RAs) with respect to operation regimes, gain dynamics, and output pulse stability. The findings are expected to be more generic than for this specific gain material. [...]
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2017-02-21
13:22
[PUBDB-2017-01061] Poster
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Ultrafast fragmentation dynamics of Phenanthrene and Pyrene after photoionization at 30.3 nm wavelength
DESY User Meeting 2017, Meeting locationHamburg, Germany, 26 Jan 2017 - 27 Jan 20172017-01-262017-01-27

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