FS-FLASH-B

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2017-11-14
13:20
[PUBDB-2017-11964] Poster
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Time resolved measurement of fluorescence kinetics from Adenine excited by soft X-rays
Workshop on Science of “From Matter to Materials and Life”, Meeting locationHamburg, Germany, 14 Dec 2016 - 16 Dec 20162016-12-142016-12-16

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2017-11-08
18:42
OpenAccess [PUBDB-2017-11787] Journal Article
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The FLASH Facility: Advanced Options for FLASH2 and Future Perspectives
ddc:600
Since 2016, the two free-electron laser (FEL) lines FLASH1 and FLASH2 have been run simultaneously for users at DESY in Hamburg. With the installation of variable gap undulators in the new FLASH2 FEL line, many new possibilities have opened up in terms of photon parameters for experiments. [...]
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2017-07-25
10:57
DBCoverage [PUBDB-2017-08413] Journal Article
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Single-shot determination of focused FEL wave fields using iterative phase retrieval
Optics express 25(15), 17892 - 17903 (2017) [10.1364/OE.25.017892]  GO
ddc:530
Determining fluctuations in focus properties is essential for many experiments at Self-Amplified-Spontaneous-Emission (SASE) based Free-Electron-Lasers (FELs), in particular for imaging single non-crystalline biological particles. We report on a diffractive imaging technique to fully characterize highly focused, single-shot pulses using an iterative phase retrieval algorithm, and benchmark it against an existing Hartmann wavefront sensor. [...]
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2017-06-23
13:37
[PUBDB-2017-05997] Journal Article
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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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2017-06-23
10:06
OpenAccess [PUBDB-2017-05924] Journal Article
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Statistical properties of a free-electron laser revealed by Hanbury Brown?Twiss interferometry
ddc:530
We present a comprehensive experimental analysis of statistical properties of the self-amplified spontaneous emission free-electron laser (FEL) FLASH by means of Hanbury Brown and Twiss interferometry. The experiments were performed at FEL wavelengths of 5.5, 13.4, and 20.8 nm [...]
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2017-05-12
11:45
OpenAccess [PUBDB-2017-02744] Journal Article
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Attosecond Interferometry with Self-Amplified Spontaneous Emission of a free-electron laser
ddc:500
Light-phase-sensitive techniques, such as coherent multidimensional spectroscopy, are well-established in a broad spectral range, already spanning from radio-frequencies in nuclear magnetic resonance spectroscopy to visible and ultraviolet wavelengths in nonlinear optics with table-top lasers. In these cases, the ability to tailor the phases of electromagnetic waves with high precision is essential [...]
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2017-04-03
10:09
OpenAccess [PUBDB-2017-01521] Journal Article
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Optimization and Characterization of High-Harmonic Generation for Probing Solid Density Plasmas
ddc:530
The creation of high energy density plasma states produced during laser–solid interaction on a sub-picosecond timescale opens a way to create astrophysical plasmas in the lab to investigate their properties, such as the frequency-dependent refractive index. Available probes to measure absorption and phase-changes given by the complex refractive index of the plasma state are extreme-UV (EUV) and soft X-ray (XUV) ultra-short pulses from high harmonic generation (HHG). [...]
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2017-03-14
18:36
OpenAccess [PUBDB-2017-01374] Internal Report
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Quantum Imaging with Incoherently Scattered Light from a Free-Electron Laser
The advent of accelerator-driven x-ray free-electron lasers (FEL) has opened new avenues for high-resolution structure determination via diffraction methods that go far beyond conventional x-ray crystallography methods. These techniques rely on coherent scattering processes that require the maintenance of first-order coherence of the radiation field throughout the imaging procedure. [...]
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2017-02-02
05:37
OpenAccess [PUBDB-2017-00830] Journal Article
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Correlated electronic decay in expanding clusters triggered by intense XUV pulses from a Free-Electron-Laser
ddc:000
Irradiation of nanoscale clusters and large molecules with intense laser pulses transforms them into highly-excited non- equilibrium states. The dynamics of intense laser-cluster interaction is encoded in electron kinetic energy spectra, which contain signatures of direct photoelectron emission as well as emission of thermalized nanoplasma electrons. [...]
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2017-01-09
12:38
OpenAccess [PUBDB-2017-00305] Journal Article
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PhotonDiag2015 workshop: introductory overview
ddc:540
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