CFEL-ARD

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2019-06-14
22:16
OpenAccess [PUBDB-2019-02481] Journal Article
et al
Acoustic Funnel and Buncher for Nanoparticle Injection
Acoustics-based techniques are investigated to focus and bunch nanoparticle beams. This process allowsus to overcome the prominent problem of the longitudinal and transverse mismatch of particle-stream andx-ray-beam size in single-particle and single-molecule imaging at x-ray free-electron lasers (XFELs). [...]
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2019-03-07
10:56
OpenAccess [PUBDB-2019-01386] Journal Article
et al
Ultrafast dissolution and creation of bonds in IrTe 2 induced by photodoping
Science advances 4(7), eaar3867 - () [10.1126/sciadv.aar3867]  GO
The observation and control of interweaving spin, charge, orbital, and structural degrees of freedom in materials on ultrafast time scales reveal exotic quantum phenomena and enable new active forms of nanotechnology. Bonding is the prime example of the relation between electronic and nuclear degrees of freedom [...]
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2019-01-03
13:17
Embargoed OpenAccess [PUBDB-2019-00026] Journal Article
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The hit-and-return system enables efficient time-resolved serial synchrotron crystallography
Nature methods 15(11), 901 - 904 () [10.1038/s41592-018-0180-2]  GO
We present a ‘hit-and-return’ (HARE) method for time-resolved serial synchrotron crystallography with time resolution from milliseconds to seconds or longer. Timing delays are set mechanically, using the regular pattern in fixed-target crystallography chips and a translation stage system. [...]
Published on 2018-10-30. Available in OpenAccess from 2019-04-30.: P14_SSX_MAIN_BC_20180809 - Download fulltextPDF Download fulltextPDF (PDFA); P14SSX_SI_BC_20180810_ES - Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
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2018-08-31
13:03
OpenAccess [PUBDB-2018-03318] Book/Report/Dissertation / PhD Thesis

High Precision Transverse Emittance Measurement for Novel Plasma Accelerators at the REGAE Linac
[DESY-THESIS-2018-025]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 186 pages: illustrations, figures () [10.3204/PUBDB-2018-03318] = Dissertation, Universität Hamburg, 2017  GO
The small 5 MeV linear accelerator REGAE at DESY produces ultra short and low charge electron bunches, on the one hand to resolve the excitation transitions of atoms temporally by pump-probe electron diffraction experiments and on the other hand to investigate principal mechanisms of laser plasma acceleration. In this context the external injection of the REGAE electron bunch as a probe of the generated plasma wakefield is planned. [...]
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2018-07-30
14:12
OpenAccess [PUBDB-2018-02727] Book/Report/Dissertation / PhD Thesis

Next Generation PIRL for Surgery and Bio-Diagnostics
[DESY-THESIS-2018-021]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 139 pp. () [10.3204/PUBDB-2018-02727] = Dissertation, Universität Hamburg, 2018  GO
Recent studies show that scar-free surgery is possible with picosecondlaser pulses tuned to the strong absorption band of water in the Mid-IR. Away to generate these pulses is with an optical parametric amplifier (OPA)pumped by a picosecond infrared laser (PIRL). [...]
OpenAccess: Kruber - Download fulltextPDF Download fulltextPDF (PDFA); Dissertation Sebastian Kruber - Download fulltextPDF Download fulltextPDF (PDFA);

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2018-01-02
08:52
Embargoed OpenAccess [PUBDB-2018-00001] Journal Article
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Thermal x-ray diffraction and near-field phase contrast imaging
epl 120(1), 16003 () [10.1209/0295-5075/120/16003]  GO
Using higher-order coherence of thermal light sources, the resolution power of standard x-ray imaging techniques can be enhanced. In this work, we applied the higher-order measurement to far-field x-ray diffraction and near-field phase contrast imaging (PCI), in order to achieve superresolution in x-ray diffraction and obtain enhanced intensity contrast in PCI. [...]
Published on 2017-12-27. Available in OpenAccess from 2018-12-27.: Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);
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2017-12-22
10:33
OpenAccess [PUBDB-2017-14028] Journal Article
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Radiation damage free ghost diffraction with atomic resolution
The x-ray free electron lasers can enable diffractive structural determination of protein nanocrystals and single molecules that are too small and radiation-sensitive for conventional x-ray diffraction. However the electronic form factor may be modified during the ultrashort x-ray pulse due to photoionization and electron cascade caused by the intense x-ray pulse. [...]
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2017-08-29
10:31
OpenAccess [PUBDB-2017-10022] Journal Article

Compression of high-density 0.16 pC electron bunches through high field gradients for ultrafast single shot electron diffraction: The Compact RF Gun
Structural dynamics 4(4), 044016 () [10.1063/1.4979970]  GO
We present an RF gun design for single shot ultrafast electron diffraction experiments that can produce sub-100 fs high-charge electron bunches in the 130 keV energy range. Our simulations show that our proposed half-cell RF cavity is capable of producing 137 keV, 27 fs rms (60 fs FWHM), 106 electron bunches with an rms spot size of 276 μm and a transverse coherence length of 2.0 nm. [...]
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2017-08-21
15:12
[PUBDB-2017-09601] Journal Article
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An endstation for resonant inelastic X-ray scattering studies of solid and liquid samples
A novel experimental setup is presented for resonant inelastic X-ray scattering investigations of solid and liquid samples in the soft X-ray region for studying the complex electronic configuration of (bio)chemical systems. The uniqueness of the apparatus is its high flexibility combined with optimal energy resolution and energy range ratio. [...]
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2017-04-06
08:33
OpenAccess [PUBDB-2017-01527] Journal Article
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Study on laser characteristics of Ho:YLF regenerative ampliers: Operation regimes, gain dynamics, and highly stable operation points
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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