CFEL-UDSS

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2019-02-27
14:52
OpenAccess [PUBDB-2019-01266] Journal Article/Contribution to a conference proceedings
et al
XMCD going ultra-cold: Experiments at 100 mK and 7 T
XXX International Conference on Photonic, Electronic, and Atomic Collisions, ICPEAC30, CairnsCairns, Australia, 26 Jul 2017 - 1 Aug 20172017-07-262017-08-01 Journal of physics / Conference Series Conference Series 875, 112005 () [10.1088/1742-6596/875/12/112005]  GO
First experiments along with the general capabilities of the TTXMCD endstation at P04, PETRA III, DESY are presented. The TTXMCD endstation allows measuring the magnetic properties of solids, thin films, molecules or atomic adsorbates at ultra-cold temperatures in an element specific way [...]
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ddc:530
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2019-01-09
13:33
OpenAccess [PUBDB-2019-00192] Journal Article
et al
Towards the geometric structure of small supported $Au_{9}$ clusters on Si
Ultra-small clusters containing few atoms are of high interest in both fundamental research and applications due to their specific functional, magnetic or chemical properties which depend on size and composition. The experimental results of the morphology of the size-selected clusters, consisting of few atoms can be an ideal benchmark for sophisticated theoretical models [...]
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ddc:600
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2019-01-07
16:59
Embargoed OpenAccess [PUBDB-2019-00069] Journal Article
et al
The LAMP instrument at the Linac Coherent Light Source free-electron laser
The Laser Applications in Materials Processing (LAMP) instrument is a new end-station for soft X-ray imaging, high-field physics, and ultrafast X-ray science experiments that is available to users at the Linac Coherent Light Source (LCLS) free-electron laser. While the instrument resides in the Atomic, Molecular and Optical science hutch, its components can be used at any LCLS beamline. [...]
Published on 2018-03-23. Available in OpenAccess from 2019-03-23.: Download fulltextPDF Download fulltextPDF (PDFA);
ddc:620
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2018-11-07
16:12
OpenAccess [PUBDB-2018-04297] Conference Presentation
et al
Towards Chirp Control of XUV Free Electron Lasers
8th EPS-QEOD EUROPHOTON CONFERENCE, BarcelonaBarcelona, Spain, 2 Sep 2018 - 7 Sep 20182018-09-022018-09-07  GO
We use 267nm femtosecond laser pulses to modulate electrons of a XUV free electron laser. By changing the chirp of this laser pulses we can influence the chirp of the generated XUV FEL pulses, which are characterized by THz streaking. [...]
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2018-10-30
15:47
OpenAccess [PUBDB-2018-04069] Book/Report/Internal Report

Field accuracy requirements for the undulator systems of the X-ray FELs at TESLA
[DESY-TESLA-FEL-2000-14]
TESLA-FEL Reports 11 pp. () [10.3204/PUBDB-2018-04069]  GO
In SASE FELs, the radiation power has to saturate in a single pass through the undulator. In the VUV and X-rayregime, with undulators ranging in length from several tens to hunderds of meters, even a few percent increase ingain length could mean a lengthening of the undulator by several meters. [...]
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2018-10-14
14:32
OpenAccess [PUBDB-2018-03782] Poster
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PIPE: The Photon-Ion-Endstation at PETRA III for Experimental Studies of XUV-Photoprocesses in Small Quantum Systems
Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen an Großgeräten, SNI 2018, GarchingGarching, Germany, 17 Sep 2018 - 19 Sep 20182018-09-172018-09-19  GO
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2018-09-19
11:11
OpenAccess [PUBDB-2018-03536] Journal Article
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Seeded X-ray free-electron laser generating radiation with laser statistical properties
The invention of optical lasers led to a revolution in the field of optics and to the creation of such fields of research as quantum optics. The reason was their unique statistical and coherence properties [...]
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ddc:500
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2018-02-06
10:49
OpenAccess [PUBDB-2018-01072] Journal Article
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Photoabsorption of the molecular IH cation at the iodine 3d absorption edge
Yields of atomic iodine I$^{q+} (q≥2)$ fragments resulting from photoexcitation and photoionization of the target ions $IH^+$ and $I^+$ have been measured in the photon-energy range 610–680 eV, which comprises the thresholds for iodine $3d$ ionization. The measured ion-yield spectra show two strong and broad resonance features due to the excitation of the $3d_{3/2,5/2}$ electrons into ɛf states rather similar for both parent ions [...]
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2018-01-17
15:59
OpenAccess [PUBDB-2018-00674] Journal Article
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Near-K -edge single, double, and triple photoionization of $C^{+}$ ions
Single, double, and triple ionization of the $C^{+}$ ion by a single photon have been investigated in the energy range 286 to 326 eV around the K-shell single-ionization threshold at an unprecedented level of detail. At energy resolutions as low as 12 meV, corresponding to a resolving power of 24 000, natural linewidths of the most prominent resonances could be determined [...]
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2018-01-09
16:17
OpenAccess [PUBDB-2018-00296] Journal Article
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High-resolution resonant inelastic extreme ultraviolet scattering from orbital and spin excitations in a Heisenberg antiferromagnet
We report a high-resolution resonant inelastic extreme ultraviolet (EUV) scattering study of the quantum Heisenberg antiferromagnet KCoF$_3$. By tuning the EUV photon energy to the cobalt M$_{23}$ edge, a complete set of low-energy 3d spin-orbital excitations is revealed [...]
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