# FS-PS

 2017-12-0714:59 [PUBDB-2017-12902] Journal Article et al Rabi oscillations of X-ray radiation between two nuclear ensembles Nature photonics 11(11), 720 - 725 (2017) [10.1038/s41566-017-0013-3]   The realization of the strong coupling regime between a single cavity mode and an electromagnetic resonance is a centrepiece of quantum optics. In this regime, the reversible exchange of a photon between the two components of the system leads to so-called Rabi oscillations. [...] Restricted: PDF PDF (PDFA); 2017-12-0714:54 [PUBDB-2017-12900] Journal et al Direct Measurement of the Pulse Duration and Frequency Chirp of Seeded XUV Free Electron Laser Pulses We report on a direct time-domain measurement of the temporal properties of a seeded free-electron laser pulse in the extreme ultraviolet spectral range. Utilizing the oscillating electromagnetic field of terahertz radiation, a single-shot THz streak-camera was applied for measuring the duration as well as spectral phase of the generated intense XUV pulses. [...] Restricted: PDF PDF (PDFA); External link: Fulltext 2017-12-0713:58 [PUBDB-2017-12869] Contribution to a conference proceedings/Contribution to a book et al Experience in Operating sFLASH With High-Gain Harmonic Generation 8th International Particle Accelerator Conference, IPAC17, Meeting locationKopenhagen, Denmark, 15 May 2017 - 19 May 2017 Geneva : JACoW, 2596-2599 (2017) [10.18429/JACoW-IPAC2017-WEPAB016]   sFLASH, the experimental setup for external seeding of free-electron lasers (FEL) at FLASH, has been operated in the high-gain harmonic generation (HGHG) mode. A detailed characterization of the laser-induced energy modulation, as well as the temporal characterization of the seeded FEL pulses is possible by using a transverse deflecting structure and an electron spectrometer. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-11-2913:16 [PUBDB-2017-12516] Journal Article et al Optical pump - nuclear resonance probe experiments on spin crossover complexes Hyperfine interactions 238(1), 89 (2017) [10.1007/s10751-017-1461-3]   A novel sample environment enabling optical pump – nuclear resonance probe experiments has been installed at the beamline P01, Petra III, DESY Hamburg. This set-up has been used to investigate optically induced spin state changes of spin crossover (SCO) complexes by nuclear resonant scattering immediately after excitation by an optical laser pulse [...] Restricted: PDF PDF (PDFA); 2017-11-2612:49 [PUBDB-2017-12328] Journal Article et al Correlations in Scattered X-Ray Laser Pulses Reveal Nanoscale Structural Features of Viruses Physical review letters 119(15), 158102 (2017) [10.1103/PhysRevLett.119.158102]   We use extremely bright and ultrashort pulses from an x-ray free-electron laser (XFEL) to measure correlations in x rays scattered from individual bioparticles. This allows us to go beyond the traditional crystallography and single-particle imaging approaches for structure investigations [...] OpenAccess: PDF PDF (PDFA); 2017-11-1623:55 [PUBDB-2017-12073] Journal Article et al Structural, magnetic and electronic properties of pulsed-laser-deposition grown SrFeO$_{3−δ}$ thin films and SrFeO$_{3−δ}$/La$_{2/3}$Ca$_{1/3}$MnO$_{3}$ multilayers Journal of physics / Condensed matter 29(49), 495601 (2017) [10.1088/1361-648X/aa93a6]   We studied the structural, magnetic and electronic properties of ${\rm SrFeO}_{3-\delta}$ (SFO) thin films and ${\rm SrFeO}_{3-\delta}$ /${\rm La}_{2/3}$ ${\rm Ca}_{1/3}$ MnO3 (LCMO) superlattices that have been grown with pulsed laser deposition (PLD) on ${\rm La}_{0.3}$ ${\rm Sr}_{0.7}$ ${\rm Al}_{0.65}$ ${\rm Ta}_{0.35}$ ${\rm O}_{3}$ (LSAT) substrates. X-ray reflectometry and scanning transmission electron microscopy (STEM) confirm the high structural quality of the films and flat and atomically sharp interfaces of the superlattices. [...] Restricted: PDF PDF (PDFA); 2017-11-1314:53 [PUBDB-2017-11901] Contribution to a conference proceedings/Contribution to a book et al Status of the Seeding Development at sFLASH Proceedings of FEL2017, Santa Fe, NM, USA38th international free electron laser conference, Meeting locationSanta Fe, NM USA, USA, 20 Aug 2017 - 25 Aug 2017 100-103 (2017) sFLASH is the experimental free-electron laser (FEL) setup producing seeded radiation installed at FLASH. Since 2015 it has been operated in the high-gain harmonic generation(HGHG) mode [...] 2017-11-0311:34 [PUBDB-2017-11676] Journal Article et al Pink-beam serial crystallography Nature Communications 8(1), 1281 (2017) [10.1038/s41467-017-01417-3]   Serial X-ray crystallography allows macromolecular structure determination at both X-ray free electron lasers (XFELs) and, more recently, synchrotron sources. The time resolution for serial synchrotron crystallography experiments has been limited to millisecond timescales with monochromatic beams. [...] OpenAccess: PDF PDF (PDFA); 2017-10-2316:15 [PUBDB-2017-11500] Journal Article et al Focal Spot and Wavefront Sensing of an X-Ray Free Electron laser using Ronchi shearing interferometry Scientific reports 7(1), 13698 (2017) [10.1038/s41598-017-13710-8]   The Linac Coherent Light Source (LCLS) is an X-ray source of unmatched brilliance, that is advancing many scientific fields at a rapid pace. The highest peak intensities that are routinely produced at LCLS take place at the Coherent X-ray Imaging (CXI) instrument, which can produce spotsize at the order of 100 nm, and such spotsizes and intensities are crucial for experiments ranging from coherent diffractive imaging, non-linear x-ray optics and high field physics, and single molecule imaging. [...] OpenAccess: PDF PDF (PDFA); 2017-09-1316:13 [PUBDB-2017-10736] Contribution to a conference proceedings/Contribution to a book et al Concept for a Seeded FEL at FLASH2 8th Intl. Particle Accelerator Conference, IPAC2017, Meeting locationCopenhagen, Denmark, 14 May 2017 - 19 May 2017 Geneva : JACoW, 2607-2610 (2017) [10.18429/JACoW-IPAC2017-WEPAB019]   The free-electron laser (FEL) FLASH is a user facility delivering photon pulses down to 4 nm wavelength. Recently, the second FEL undulator beamline FLASH2 was added to the facility. [...] OpenAccess: PDF PDF (PDFA);