FS-FLASH

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2018-09-27
10:43
OpenAccess [PUBDB-2018-03641] Journal Article
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Probing the non-equilibrium transient state in magnetite by a jitter-free two-color X-ray pump and X-ray probe experiment
Structural dynamics 5(5), 054501 () [10.1063/1.5042847]  GO
We present a general experimental concept for jitter-free pump and probe experiments at free electron lasers. By generating pump and probe pulse from one and the same X-ray pulse using an optical split-and-delay unit, we obtain a temporal resolution that is limited only by the X-ray pulse lengths. [...]
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2018-09-07
15:47
[PUBDB-2018-03414] Journal Article
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X-ray spectroscopy with variable line spacing based on reflection zone plate optics
Optics letters 43(18), 4390 - 4393 () [10.1364/OL.43.004390]  GO
X-ray spectroscopy is a method, ideally suited for investigating the electronic structure of matter, which has been enabled by the rapid developments in light sources and instruments. The x-ray fluorescence lines of life-relevant elements such as carbon, nitrogen, and oxygen are located in the soft x-ray regime and call for suitable spectrometer devices [...]
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2018-08-31
13:01
[PUBDB-2018-03317] Report

Beam Based Alignment of the TESLA X-ray FEL undulators
[ TESLA FEL 2001-04 ]
11 pp. ()
One of the important parameters that determine the performance of the FEL is the overlap between electronbeam and radiation field during the amplification process. An earlier study has shown that in order to maintain thisoverlap, quadrupoles have to be aligned with an accuracy of 1m [...]
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2018-08-31
12:44
[PUBDB-2018-03315] Report
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Development of a Femtosecond Soft X-ray SASE FEL atDESY
[ TESLA FEL 2001-02 ]
24 pp. ()
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2018-08-31
11:32
[PUBDB-2018-03310] Report

Contributions to the FEL2002 Conference, September 9-13, 2002 in Argonne, IL, USA
[ TESLA FEL 2002-06 ]
97 pp. ()
The Free-Electron Laser (FEL) at the TESLA Test Facility at DESY operates in the self-amplified spontaneous emissionmode and generates sub-100-fs radiation pulses in the vacuum ultraviolet spectral region. During operation in the saturationregime, radiation pulses with GW peak power are produced [...]
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2018-08-13
18:56
Embargoed OpenAccess [PUBDB-2018-02939] Journal Article
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ID-Full Field Microscopy of Elastic and Inelastic Scattering with Transmission off-axis Fresnel Zone Plates
Published on 2018-08-10. Available in OpenAccess from 2019-02-10.: Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
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2018-08-10
17:51
Embargoed OpenAccess [PUBDB-2018-02898] Journal Article
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Diffractive X-ray Optics for Synchrotrons and Free-Electron Lasers
Published on 2018-08-16. Available in OpenAccess from 2019-02-16.: Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
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2018-05-08
17:10
OpenAccess [PUBDB-2018-01928] Journal Article
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Total 3s emission Yield as Bulk-Sensitive Probe for a True Soft X-ray Absorption Spectrum?
The detection of the true soft X-ray absorption typically needs specially prepared submicrometer thin samples for transmission measurements. Bulk experiments instead have to rely on yield methods, for example, electron yield with limitations for insulating samples, sensitivity to applied fields, and with limited bulk sensitivity. [...]
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2018-04-18
15:22
OpenAccess [PUBDB-2018-01787] Journal Article
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Multidimensional photoemission spectroscopy—the space-charge limit
Photoelectron spectroscopy, especially at pulsed sources, is ultimately limited by the Coulomb interaction in the electron cloud, changing energy and angular distribution of the photoelectrons. A detailed understanding of this phenomenon is crucial for future pump–probe photoemission studies at (x-ray) free electron lasers and high-harmonic photon sources. [...]
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2018-01-12
10:42
[PUBDB-2018-00596] Journal Article
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Short-wavelength free-electron laser sources and science: a review
This review is focused on free-electron lasers (FELs) in the hard to soft x-ray regime. The aim is to provide newcomers to the area with insights into: the basic physics of FELs, the qualities of the radiation they produce, the challenges of transmitting that radiation to end users and the diversity of current scientific applications. [...]
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