FS-CFEL-3

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2017-07-31
11:48
[PUBDB-2017-08762] Journal Article
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Cationic and Anionic Impact on the Electronic Structure of Liquid Water
ddc:530
Hydration shells around ions are crucial for many fundamental biological and chemical processes. Their local physicochemical properties are quite different from those of bulk water and hard to probe experimentally. [...]
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2017-07-28
13:11
[PUBDB-2017-08695] Journal Article
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Weak-field few-femtosecond VUV photodissociation dynamics of water isotopologues
ddc:530
We present a joint experimental and theoretical study of the VUV-induced dynamics of $H_2O$ and its deuterated isotopologues in the first excited state $(A^1B_1)$ utilizing a VUV-pump VUV-probe scheme combined with $ab$ initio classical trajectory calculations. 16-fs VUV pulses centered at 161 nm created by fifth-order harmonic generation are employed for single-shot pump-probe measurements. [...]
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2017-07-03
13:31
OpenAccess [PUBDB-2017-06657] Journal Article
; ; ; et al
Short-Time Electron Dynamics in Aluminum Excited by Femtosecond Extreme Ultraviolet Radiation
ddc:550
The femtosecond dynamics of the electrons in aluminum after an intense extreme ultraviolet pulse is investigated by Monte Carlo simulations. Transient distributions of the conduction band electrons show an almost thermalized, low-energy part and a high-energy tail [...]
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2017-06-30
17:57
OpenAccess [PUBDB-2017-06524] Journal Article
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Pulse Duration of Seeded Free-Electron Lasers
ddc:530
The pulse duration, and, more generally, the temporal intensity profile of free-electron laser (FEL) pulses, is of utmost importance for exploring the new perspectives offered by FELs; it is a nontrivial experimental parameter that needs to be characterized. We measured the pulse shape of an extremeultraviolet externally seeded FEL operating in high-gain harmonic generation mode. [...]
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2017-06-23
13:37
[PUBDB-2017-05997] Journal Article
; ; ; et al
Soft x-ray induced femtosecond solid-to-solid phase transition
ddc:530
Soft x-rays were applied to induce graphitization of diamond through a non-thermal solid-to-solid phase transition. This process was observed within poly-crystalline diamond with a time-resolved experiment using ultrashort soft x-ray pulses of duration 52.5 fs and cross correlated by an optical pulse of duration 32.8 fs [...]
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2017-06-12
13:43
OpenAccess [PUBDB-2017-04727] Journal Article
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Attosecond x-ray scattering from a particle-hole wave packet
ddc:530
We investigate the imaging of electron wave-packet dynamics by measuring the pattern of inelastically scattered photons. For this purpose, we develop a theory of time-resolved Compton scattering [...]
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2017-06-01
14:22
[PUBDB-2017-04151] Journal Article
; ; ; et al
Femtosecond response of polyatomic molecules to ultra-intense hard X-rays
Nature 546(7656), 129 - 132 (2017) [10.1038/nature22373]  GO
ddc:070
X-ray free-electron lasers enable the investigation of the structure and dynamics of diverse systems, including atoms, molecules, nanocrystals and single bioparticles, under extreme conditions1, 2, 3, 4, 5, 6, 7. Many imaging applications that target biological systems and complex materials use hard X-ray pulses with extremely high peak intensities (exceeding 1020 watts per square centimetre)3, 5. [...]
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2017-06-01
09:04
OpenAccess [PUBDB-2017-04131] Journal Article
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Emitter-site-selective photoelectron circular dichroism of trifluoromethyloxirane
ddc:530
The angle-resolved inner-shell photoionization of R-trifluoromethyloxirane, C$_3$H$_3$F$_3$O, is studied experimentally and theoretically. Thereby, we investigate the photoelectron circular dichroism (PECD) for nearly symmetric O 1s and F 1s electronic orbitals, which are localized on different molecular sites [...]
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2017-06-01
08:59
[PUBDB-2017-04130] Journal Article
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Influence of model parameters on a simulation of x-ray irradiated materials: example of XTANT code
SPIE Optics + Optoelectronics, Meeting locationPrague, Czech Republic,
Proceedings of SPIE 10236, 102360I (2017) [10.1117/12.2266953]  GO
ddc:620
In this contribution an analysis of influence of model parameters on the results of simulations of material properties under free-electron laser irradiation is presented. It is based on the in-house hybrid code XTANT (X-ray-induced Thermal And Nonthermal Transition; N [...]
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2017-06-01
08:55
[PUBDB-2017-04129] Journal Article
; ; ; et al
Classical Monte-Carlo simulations of x-ray induced electron cascades in various materials
SPIE Optics + Optoelectronics, Meeting locationPrague, Czech Republic,
Proceedings of SPIE 10239, 102360H (2017) [10.1117/12.2267939]  GO
ddc:620
In this paper, we present an extension to our code, XCASCADE [Medvedev, Appl. Phys [...]
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