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Ludvig Kjellsson25/06/2018, 17:00Contributed poster
A novel type of grazing incidence soft X-ray spectrometer is being constructed for the SQS (Small Quantum Systems) scientific instrument at the European XFEL. It uses a cylindrical constant-line-spacing grating in Rowland mount for dispersion of the X-rays in the vertical direction. A Wolter mirror pair images the source on the detector in horizontal direction. This arrangement facilitates a...
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Francesco Stellato (INFN)25/06/2018, 17:00Contributed poster
A proposal for building a Free Electron Laser, EuPRAXIA@SPARC_LAB, at the Laboratori Nazionali di Frascati, is at present under consideration. This FEL facility will exploit plasma acceleration to produce ultra-bright photon pulses with durations of few femtoseconds down to a wavelength between 2 and 4 nm, in the so called “water window”. The project is now focused on machine development, but...
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Mr Jasper Peschel (Lund University)25/06/2018, 17:00Contributed poster
Short and intense extreme ultraviolet (XUV) pulses are a valuable tool to study ultrafast dynamics and non-linear processes in atomic and molecular systems. These XUV pulses can be generated by two complementary techniques, Free Electron Lasers (FELs) and High-order Harmonic Generation (HHG). The advantage of HHG is a pulse duration on the attosecond time scale, whereas, due to low conversion...
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Björn Senfftleben (University of Nebraska-Lincoln, Lincoln, NE, USA)25/06/2018, 17:00Contributed poster
Until recently, the investigation of X-ray light matter interaction was limited by available X-ray intensities. These days, X-ray Free Electron Lasers (XFELS) allow for observation and examination of many non-linear effects in the X-ray regime. One of the most fundamental non-linear effects is Second Harmonic Generation (SHG). While the effect is well understood in the optical regime, the...
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Jona Keri (University of Tirana, Faculty of Natural Science, Chemistry Department)25/06/2018, 17:00Contributed poster
The replacement of hydroxyl ions by fluoride ions is determined quantitatively for the Perrenjas clay mineral. The pH of the clay suspension in contact with fluoride ions increases because of the hydroxyl ions release. This iron rich montmorillonite clay mineral is washed out almost completely from its aluminum, iron, magnesium and hydroxyl groups by sulfuric acid treatment and afterwards was...
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Dr Alan Mak (Uppsala University)25/06/2018, 17:00Contributed poster
Modern light sources continue to improve our knowledge of the natural world, from the subtle workings of life to matter under extreme conditions. Free-electron lasers, for instance, have enabled the characterization of biomolecular structures with sub-ångström spatial resolution, and paved the way to controlling the molecular functions. However, to broaden our scope of the ultrafast world, we...
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Boyang Liu25/06/2018, 17:00Contributed poster
Nearly all chemical processes involved in energy conversion utilize catalytic chemical transformations at interfaces between solids and liquids or gases. While most of the existing understanding is based on a static view of reactions at interfaces, the X-ray Free Electron Laser (FEL) opens up the dynamic regime where studies of the reaction mechanism to observe transformations on timescales...
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Duane Loh (National University of Singapore)25/06/2018, 17:00Contributed poster
The concept of single-particle-imaging (SPI) of macromolecules using ultrashort intense x-ray pulses (proposed [6] and studied in detail [5]) have been corroborated by a series of experimental demonstrations [2–4, 7]. These demonstrations focussed on different aspects of SPI (e.g. algorithms, signal to noise ratio, sample delivery, etc), but have been silent on the general and crucial question...
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Elias Diesen (Stockholm University)25/06/2018, 17:00Contributed poster
Understanding the reaction paths and transition states of catalytic reactions is a key issue in order to design highly reactive and selective catalysts. Ultrashort free-electron laser (FEL) soft x-ray pulses are a novel tool ideally suited for investigating time-dependent surface processes, due to the femtosecond resolution and tunability of the excitation energy to specific adsorbate...
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Ulrike Boesenberg (European XFEL)25/06/2018, 17:00Contributed poster
Strain and stresses influence the diffraction properties of crystals significantly. We analyze the effect of strong bending on the energy resolution of a reflection using an ultra-thin, strongly bent single crystal diamond to be implemented as a spectrometer at the European XFEL. The device is designed to measure the energy distribution in the self-amplified spontaneous emission (SASE) beam...
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Ms Niloofar Esmaeildoost (Biomedical and X-Ray Physics, Department of Applied Physics, AlbaNova University Center, KTH Royal Institute of Technology)25/06/2018, 17:00Contributed poster
ABSTRACT
Crystallization of liquid water and aqueous solutions is a common phenomenon which occurs frequently in our natural environment. Therefore, it is important to understand the dynamics of ice nucleation on a microscopic level. This will significantly promote the progress of science in relevant research fields such as biology, chemistry, atmospheric science and astronomy. The prevention...
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Simone Di Mitri (Elettra Sincrotrone Trieste)25/06/2018, 17:00Contributed poster
We demonstrate that emission of coherent transition radiation by a 1 GeV energy-electron beam is enhanced in intensity and extended in frequency, by the energy correlation established along the beam by coherent synchrotron radiation (CSR), in the presence of a proper electron optics in the beam delivery system. Analytical and numerical models, based on experimental electron beam parameters...
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Yevheniy Ovcharenko (European XFEL)25/06/2018, 17:00Contributed poster
Y. Ovcharenko$^{1,9,*}$, A. LaForge$^2$, B. Langbehn$^1$, O. Plekan$^3$, R. Cucini$^3$, P.Finetti$^3$, P.O’Keeffe$^4$, D. Iablonskyi$^5$, N. Toshiyuki$^6$, K. Ueda$^5$, P. Piseri$^7$, M. DiFraia$^3$, R. Richter$^3$, M.Coreno$^{3,4}$, C.Callegari$^3$, K. C. Prince$^{3,8}$, F.Stienkemeier$^2$, T. Möller$^{1,*}$ and M. Mudrich$^{10}$
$^1$Technische Universität Berlin, Germany; $^2$Universität...
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Dr Takahiro Sato (LCLS, SLAC National Accelerator Laboratory)25/06/2018, 17:00Contributed poster
The capabilities of XFEL sources enable scientific investigations at the frontiers of spatial and temporal resolutions. One of the key procedures in time resolved experiments combining XFEL and optical lasers is the establishment of temporal overlap, i.e. “time zero”, between the ultrafast X-ray and optical laser pulses with sub-picosecond accuracy. In order to determine time zero, several...
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Armin Azima25/06/2018, 17:00Contributed poster
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 chirp of the generated intense XUV pulses in a fully parasitic way. The...
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Jan Lahl (Lund University)25/06/2018, 17:00Contributed poster
Intense extreme ultraviolet (XUV) light generated in a high-order harmonic generation (HHG) process or delivered by a Free Electron Laser (FEL) allows the investigation of multiphoton ionization processes on a femtosecond timescale in the gas phase$^{1,2}$. The investigation of the underlying ionization and fragmentation processes can be facilitated by obtaining the correlated momentum...
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Loïc Le Guyader (European X-Ray Free-Electron Laser Facility GmbH)25/06/2018, 17:00Contributed poster
The ultrafast demagnetization is a fundamental problem of modern magnetism, with its microscopic origin remaining intensely debated. Particularly, the role played by the spin-orbit interaction in the moment dissipation to the lattice and that of the exchange interaction in the collapse of long-range order call for measurements capable of resolving the charge, spin and the orbital moment...
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Mikako Makita (European XFEL)25/06/2018, 17:00Contributed poster
M. Makita a, I. Vartiainen a, I. Mohacsi a, C. Caleman b, c, A. Diaz a, H. O. Jönsson c, P. Juranić a,
N. Medvedev d, e, A. Meents b, A. Mozzanica a, N. Opara a, C. Padeste a, V. Panneels a, V. Saxena b, f,
M. Sikorski g, S. Song g, L. Vera a, P. R. Willmott a, P. Beaud a, C.J. Milne a, B. Ziaja-Motyka b, h,
and C. David a(a) Paul Scherrer Institut, CH-5232 Villigen PSI,...
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Mr Nico Rothenbach (University of Duisburg-Essen and CENIDE)25/06/2018, 17:00Contributed poster
A localized optical excitation of a metal/insulator heterostructure induces
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ultrafast dynamics in its individual compounds, which can involve
charge and spin transfer processes as well as coupling to low
energy excitations mediated by e.g. electron-electron and electron-phonon
scattering. Femtosecond soft x-ray spectroscopy facilitates to
separate and identify these electronic and lattice... -
Günter Brenner (DESY Hamburg)25/06/2018, 17:00Contributed poster
At the plane grating monochromator beamline PG2 at FLASH a new referencing scheme for X-ray absorption spectroscopy (XAS) has been successfully tested. Similar to the approaches realized at SACLA [1] and LCLS [2], it employs a nanofabricated diffractive transmission grating to split the FEL beam into two identical copies (signal & reference) for single shot intensity normalization. The...
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Dr Marion Kuhlmann (DESY)25/06/2018, 17:00Contributed poster
The variable micro-focus beamline FL24 of the Free-electron LASer in Hamburg FLASH consist of a bending mirror focusing system. This Kirkpatrick-Beaz Active Optics System (KAOS) is a product of Fermi@Elettra. The open port beamline FL24 of the second SASE FEL branch of FLASH with variable gap undulators is designed to deliver the full fundamental wavelengths range of 4-90nm, distinguished...
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Hampus Wikmark (Lund University)25/06/2018, 17:00Contributed poster
In the High-order Harmonic Generation (HHG) process, an intense laser field is used to create subfemtosecond pulses with photon energies up to hundreds of eV. At the High Intensity XUV beamline, high energy infrared (IR) pulses are used with a loose focusing geometry to produce intense extreme ultraviolet (XUV) attosecond pulse trains. The generated XUV radiation can be focused to high enough...
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David Dunning (STFC Daresbury Laboratory, United Kingdom)25/06/2018, 17:00Contributed poster
X-ray free-electron lasers have recently been shown to produce radiation pulses with sub-fs duration. Ultimately they have the potential to deliver pulses with duration significantly shorter than ~50 as that is delivered by the present leading technique - high harmonic generation (HHG) - and so extend the frontiers of ultrafast science. Several techniques have been proposed to extend the...
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William Schlotter (SLAC)25/06/2018, 17:00Contributed poster
We introduce a novel method for soft x-ray absorption spectroscopy (XAS) featuring high sensitivity and compatibility with time resolved ultrafast short-pulse FEL experiments. As a demonstration, we have measured the optically induced insulator to metal transition in VO2 with time resolved XAS. Probing the oxygen electronic system, we observe a fast sub-100 fs response in VO2 followed by a...
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Dmytro Kutnyakhov (DESY)25/06/2018, 17:00Contributed poster
Photoemission spectroscopy (PES) is a powerful technique, which allows to investigate the electronic properties of solid systems and molecules. If used in combination with high repetition rate free electron lasers (FEL) in the XUV and soft X-ray regime such as FLASH, DESY, Hamburg or with table-top laser systems based on the high harmonic generation (HHG), it offers unique possibilities for...
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Dr Yinfei Lu (1. Heinrich-Pette-Institut – Leibniz Institute for Experimental Virology, 2. European XFEL)25/06/2018, 17:00Contributed poster
Native mass spectrometry (MS) enables the ionization and transfer of intact non-covalent protein complexes into the gas phase. As such, it is a perfect tool to study proteins and their assemblies in a mass and conformation specific manner. This enables MS to probe structural transitions which proteins and their complexes undergo, e.g. during a viral lifecycle. Such transient states are of high...
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Rico Mayro Tanyag (Max-Born-Institut)25/06/2018, 17:00Contributed poster
Superfluid helium droplets do not rotate as a solid body; instead, the droplet’s rotation is manifested through the presence of quantized vortices. The vortices have a diameter of ~2 Å and their detection remain an outstanding experimental problem. Here, we report on X-ray coherent diffraction imaging of free, single, rotating superfluid $^4$He droplets (diameter D = 200 - 2000 nm, temperature...
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Prof. Henryk Fiedorowicz (Military University of Technology, Institute of Optoelectronics)25/06/2018, 17:00Contributed poster
Results of investigation on interaction of intense nanosecond extreme ultraviolet (EUV) pulses with gases and solids are presented. EUV is generated using laser plasma sources based on plasma produced by irradiation of a gas puff target with nanosecond laser pulses. Commercially available Nd:YAG lasers (EXPLA) generating 4 ns/0.8 J or 10 ns/10 J at 10 Hz were used to irradiate the...
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Dominik Kinschel (Ecole Polytechnique Federale de Lausanne)25/06/2018, 17:00Contributed poster
Myoglobin is a small protein consisting of a single polypeptide chain of 153 amino acid residues and a heme as its active center. It plays a central role in many biological functions based on detection, transport, release and/or binding of molecular ligands such as O2, CO, NO, CN, etc. The unligated high-spin form (deoxyMb) binds the ligand at the Fe of the heme, leading to a change to the...
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Markus Scholz (European XFEL)25/06/2018, 17:00Contributed poster
The unique properties of hard X-ray laser beams generated by the European XFEL will enable completely new experiments in materials science. In particular, the Materials Imaging and Dynamics (MID) station will offer extended capabilities for scattering and imaging experiments, e.g. coherent X-ray diffractive imaging (CXDI) and X-ray photon correlation spectroscopy (XPCS), compared to present...
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Dr Harshad Pathak (Fysikum, Stockholm University)25/06/2018, 17:00Contributed poster
Water is one of the most critical substances on earth for life. Many important biological and geological reactions important for life take place in water. It has anomalous properties like increased specific heat capacity and isothermal compressibility on cooling at ambient conditions. These become more pronounced on supercooling. These thermodynamic properties are a result of the unique...
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Dr Matthew Robinson (Universität Potsdam)25/06/2018, 17:00Contributed poster
Electron diffraction has been a staple technique for determining the structure of countless molecules for nearly a century [1]. However, it has only been in the last couple of decades that we have been able to use this technique to obtain time-resolved images of molecules undergoing light-induced chemical processes. Whilst numerous ultrafast electron diffraction (UED) experiments have been...
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Badriah Alotaibi (Strathclyde university)25/06/2018, 17:00Contributed poster
Abstract:
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A Free Electron Laser (FEL) is the brightest and coherent radiation source in the world and many research interest in reducing the cost and the size of the bright future FELs by utilizing different kinds of accelerator techniques. In this work we consider Laser-Plasma accelerator as a promising future driven FEL next-generation compact light sources. In this modelling of a laser-... -
Prof. Laszlo Veisz (Umea University)25/06/2018, 17:00Contributed poster
Nanophotonics is based on the interaction of light with nanometer sized objects [1]. It provides formerly inaccessible sub-wavelength focusing and electro-magnetic field enhancement. Nowadays, it is broad research field with many proof-of-principle studies, especially acceleration of electrons [2] and practical applications [3]. Nanophotonics has been investigated with laser intensities up to...
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Stefano Bonetti (Stockholm university)25/06/2018, 17:00Contributed poster
The interaction between magnetism and light is receiving considerable interest in recent years, after the groundbreaking experiments that showed that ultrashort (∼100 fs) infrared light pulses can be used to demagnetise or even switch the magnetisation of thin film ferromagnets. However, to date no clear and commonly accepted understanding of the fundamental physical processes governing the...
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Dr Markus Ilchen (University of Kassel)25/06/2018, 17:00Contributed poster
The combination of polarization control with the unique properties of free-electron lasers in terms of high intensity and ultrashort pulse duration offer unique perspectives on non-linear and time-resolved insights in “handed” systems. Handedness, i.e. chirality, is of crucial interest for understanding the origination of life on earth but also in the spin properties of fundamental as well as...
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Hsin-Yi Wang (Stockholm Univeristy)25/06/2018, 17:00Contributed poster
The adsorption of the gas molecule to the transition metal or noble metal surface, through a weakly bound “precursor” state which facilitate the gas molecule to lose its rotational and translation energy before forming a stable chemisorption bond, is the most fundamental elementary surface chemical process. In particular, our previous work has demonstrated the short-live transient precursor...
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Dr Shirly Espinoza (ELI Beamlines)25/06/2018, 17:00Contributed poster
Shirly Espinoza 1, Stefan Zollner 2, Steffen Richter 1, Mateusz Rebarz 1, Oliver Herrfurth 2, Rudiger Schmidt-Grund 2 and Jakob Andreasson 1
1 ELI Beamlines, Institute of Physics, Czech Academy of Science, Na Slovance 2, 18221 Prague, Czech Republic
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2 Universität Leipzig, Felix-Bloch-Institut für Festkörperphysik, Linnéstr. 5, 04103 Leipzig, Germany
3 Department of Physics, New Mexico State... -
Saikat Nandi (Division of Atomic Physics, Lund University)25/06/2018, 17:00Contributed poster
The development of attosecond photoelectron spectroscopy based on two-color (XUV or, extreme-ultraviolet and NIR, or, near-infrared) interferometric techniques [1] has enabled studying the dispersion dynamics of electron wave-packets in atoms [2], molecules [3] and solids [4]. In a recent experiment, we have demonstrated that it is possible to simultaneously combine high spectral and...
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Dr Christian Stamm (ETH Zurich)25/06/2018, 17:00Contributed poster
The emergence of spin currents after ultrafast laser excitation of a magnetic thin film was predicted in the theory of superdiffusive spin currents, which was originally developed to describe the process of ultrafast demagnetization [1]. Experimentally, spin current pulses have been detected by magneto-optical measurements using fs-pulsed VUV radiation [2,3], or through the emission of THz...
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13. Recent experimental results from FLASH2 on novel FEL lasing schemes with variable gap undulatorsMikhail Yurkov (DESY)25/06/2018, 17:00Contributed poster
We discuss principles and experimental verification of advanced schemes for X-ray FELs using variable gap undulators (harmonic lasing self-seeded FEL, reverse tape etc.). Harmonic lasing in XFELs is an opportunity to extend operating range of existing and planned X-ray FEL user facilities. Contrary to nonlinear harmonic generation, harmonic lasing can provide much more intense, stable, and...
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Ruslan Kurta (European XFEL)25/06/2018, 17:00Contributed poster
Imaging individual biological particles, such as macromolecules or viruses, at high resolution is one of the most attractive challenges for x-ray free electron lasers (XFELs). It was predicted that diffraction patterns from single particles can be measured in “diffraction before destruction” experiments at XFELs before the sample is destroyed by intense radiation, and hence their damage-free...
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Dr Mikako Makita (European XFEL GmbH)25/06/2018, 17:00Contributed poster
In May 2018, all three undulators are in operation at the European XFEL, and will start opening to users from the end of 2018. The High-Energy Density (HED) science instrument is one of the two endstations at SASE 2 and is dedicated to the studies of matter at extreme conditions. Major scientific applications include dynamic and static compression studies, time-resolved femtosecond HED...
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Dr Jaehyun Park (Pohang Accelerator Laboratory)25/06/2018, 17:00Contributed poster
Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL) facility has finished the commissioning successfully and started user operation from 2016. The NCI experimental hutch, which is one of the hard X-ray experimental stations, has been designed and prepared to perform serial femtosecond crystallography (SFX) experiments. We will present the current status of the sample...
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Dr Rosen Ivanov (Deutsches Elektronen Synchrotron - DESY)25/06/2018, 17:00Contributed poster
Since the free-electron laser FLASH at DESY in Hamburg, [1] lases in Self-Amplified Spontaneous Emission (SASE) mode each pulse is “unique” and has different pulse energy, spectrum, arrival time and pulse duration. A Terahertz (THz) field driven streak camera [2,3] has the potential to deliver single-shot pulse duration information basically wavelength independent and with a high dynamic range...
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Emmanuelle Jal (Sorbonne Université - LCPMR - 4 place Jussieu 75005 Paris, France)25/06/2018, 17:00Contributed poster
With the advent of X-ray Free Electron Lasers (XFELs) femtosecond time resolved experiments employing advanced X-ray probe techniques have become routinely possible in a wide variety of scientific domains. A significant number of these experiments concerns the relaxation dynamics following an externally supplied excitation, which is typically realized by an electromagnetic pump pulse...
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Mr Andreas Wituschek (PhD Student)25/06/2018, 17:00Contributed poster
Coherent time-resolved spectroscopy is a powerful tool to study ultrafast dynamics in complex systems. Extending this to the XUV spectral region is on the frontier of nonlinear spectroscopy. However, demands on interferometric stability increase when going to short wavelengths and advanced pulse manipulation in the XUV is challenging. In seeded free electron lasers (FEL) the emitted XUV pulses...
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Oleksii Rebrov (Department of Physics, Stockholm University)25/06/2018, 17:00Contributed poster
Stereospecific molecular interaction is one of the means used in nature to maximize the specificity of bio-chemical reactions. Most biomolecules are chiral, i.e. exist in two enantiomeric forms that are non-superimposable mirror images of each other. Different enantiomers of a compound may differ substantially in their bio-chemical activities and result in different biological response. The...
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Dr Zongfang Wu (FHI der MPG)25/06/2018, 17:00Contributed poster
In model catalysis and general surface science studies the vibrational characterization of surfaces is usually performed with HREELS (high resolution electron energy loss spectroscopy) or IRAS (infrared reflection absorption spectroscopy). Both methods have disadvantages: HREELS suffers from its low resolution and (in the case of ionic samples) the presence of intense multiple phonon losses,...
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Graham Appleby (European XFEL GmbH)25/06/2018, 17:00Contributed poster
The European Cluster of Advanced Laser Light Sources (EUCALL) generates collaboration and synergy between large scale sources of laser-driven and accelerator-driven x-ray radiation.
The lead project partner is European XFEL, while the other partners are DESY, the Extreme Light Infrastructure (ELI) in Czech Republic, Hungary and Romania; ESRF in Grenoble, Helmholtz Zentrum Dresden-Rossendorf,...
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Sverker Werin (Lund University)25/06/2018, 17:00Contributed poster
Joel Andersson), J. Björklund Svensson), Francesca Curbis)), Vitaliy Goryashko), Lennart Isaksson), Marija Kotur), Dionis Kumbaro), Filip Lindau), Alan Mak), Erik Mansten), David Olsson), Mihai Pop)**), Georgii Shumailov), Hamed Tarawneh), Pedro Fernandes Tavares), Sara Thorin), Alexey Vorozhtsov) and Sverker Werin)*)
*) MAX IV Laboratory, Lund University, Lund,...
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Michael Odelius (Stockholm University)25/06/2018, 17:00Contributed poster
Inter-molecular interactions (in particular hydrogen bonding) influence solvation and reaction pathways, and investigations of electronic structure and dynamics on the molecular level are important for a detailed understanding of chemical processes in solution.
In this presentation of a few case studies, I discuss how multi-configuration quantum chemistry (particularly RASPT2) , density...
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Mr Chunhai Lyu (Max Planck Institute for Nuclear Physics)25/06/2018, 17:00Contributed poster
Since the advent of x-ray free-electron lasers (XFELs), considerable
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efforts have been devoted to achieve x-ray pulses with better
temporal coherence. Here, we put forward a scheme to generate
fully coherent x-ray lasers (XRLs) based on population inversion in
highly charged ions, created by fast inner-shell photoionization
using XFEL pulses in a laser-produced plasma. Numerical... -
Tetiana Kulik (Chuiko Institute of Surface Chemistry of NAS of Ukraine)25/06/2018, 17:00Contributed poster
In one of the recent reviews, it has been shown that effective biomass conversion requires the integration of biochemical and thermochemical methods [1]. A catalytic pyrolysis is a promising tool for further upgrading of pyrolysis oils components to the value-added fuels and chemicals [2]. The identification of reaction products and the understanding of the mechanisms of thermal decomposition...
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Jonas Sellberg (KTH Royal Institute of Technology)25/06/2018, 17:00Contributed poster
Diffraction before destruction using x-ray free-electron lasers (XFELs) has the capability to determine radiation damage-free structures without the need for crystallization. In this poster we present the 3D reconstruction of the Melbournevirus from single-particle x-ray diffraction patterns collected at the LINAC Coherent Light Source (LCLS) and use reconstructions from simulated data to...
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Nikola Stojanovic (DESY)25/06/2018, 17:00Contributed poster
At FLASH, the free electron laser in Hamburg, an unique scheme is used to laser X-ray pulse and THz pulse by the same electron bunch for pump-probe experiment. However the timing overlap is achieved at the price of losing pulse energy and bandwidth of the X-ray pulse in a back reflection, since the THz beamline is longer in optical path. A new scheme of lasing the X-ray and THz pulses are...
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Mr Haider Al-Juboori (UCD)25/06/2018, 17:00Contributed poster
Time Dynamics and Spectral Resolved Emission Imaging of Colliding Laser Produced Aluminum Plasma
Haider Mahdi Al-Juboori1, Thomas McCormack1
1University College Dublin, School of Physics, Belfield, Dublin 4, Ireland.
email: haider.al-juboori@ucd.ieAbstract
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Colliding laser produced plasma have been investigated in a wide range of laser irradiance regimes (1010- 1015 W/cm2) and for several... -
Günter Brenner (DESY Hamburg)25/06/2018, 17:00Contributed poster
The XUV double stage Raman spectrometer is a permanent experimental end-station at the PG1 monochromator beamline at the free-electron laser FLASH at DESY in Hamburg, Germany [1,2]. This unique instrument is designed to cover the photon energy range from 20 to 200 eV with high energy resolution of about 2 – 20 meV (design values in additive mode) and to suppress the elastic line and stray...
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Jan Metje (University of Potsdam, Potsdam, Germany)25/06/2018, 17:00Contributed poster
Excited molecules can reconvert their excitation energy into other types such as electronic, chemical or thermal energy. The relevant molecular processes are ultrafast and often involve coupled electronic and nuclear dynamics not fulfilling the Born-Oppenheimer approximation. Their experimental investigation is complicated by the existence of dark 𝑛𝜋* states if the molecule contains...
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Natalia Gerasimova (European XFEL GmbH)25/06/2018, 17:00Contributed poster
We report on the first to our knowledge measurements of TRXEOL (time-resolved X-ray excited optical luminescence) with sub-picosecond time resolution. The up-conversion gating technique applied to luminescence in CsI single crystals excited by XUV pulses from FLASH allowed monitoring the energy relaxation during thermalization, self-trapping of charge carriers and formation of luminescence...
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Sylvain Maclot (Lund University / Atomic Physics)25/06/2018, 17:00Contributed poster
The development of the free electron laser (FEL) gives us a new way to investigate the interplay between electrons and nuclear motions with intense short wavelength pulses [1]. The pulse duration of current FELs varies from a few femtosecond of hard X-rays to around 100 femtoseconds of extreme ultraviolet (XUV) radiation. Recent works showed that the multiphoton ionization process allows to...
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Bastian Manschwetus (DESY)25/06/2018, 17:00Contributed poster
Polycyclic aromatic hydrocarbons (PAHs) are abundant in the interstellar medium, and understanding their fragmentation dynamics upon exposure to cosmic background radiation sheds light on key processes that affect the structure and evolution of galaxies [1,2]. Cosmic background radiation, i.e. the He II fluorescence line at 30.3nm wavelength, ionizes PAH molecules and triggers a range of...
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Dr Olof Jönsson (Department of Physics and Astronomy, Uppsala University; Biomedical and X-ray Physics, KTH)25/06/2018, 17:00Contributed poster
The bright ultrafast pulses of X-ray Free-Electron Lasers allow investigation into the structure of matter under extreme conditions. We have used single pulses to ionize and probe water as it undergoes a phase transition from liquid to plasma. We report changes in the structure of liquid water on a femtosecond timescale when irradiated by single 6.86 keV X-ray pulses of more than 10$^{6}$...
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Mr ABDULLAH KAHRAMAN (Material Science and Engineering, Koç University TUPRAS Energy Center(KUTEM), Koç University Surface Science and Technology Center(KUYTAM), Koç University, Istanbul 34450, Turkey)25/06/2018, 17:00Contributed poster
BiVO4 is one of the most promising materials to be used as photoanodes in photoelectrochemical cells (PEC) for water splitting (Figure 1). To improve the light absorbance and charge carrier utilization performance of BiVO4, it is of key importance to understand charge transportation to the interface and interfacial transfer mechanism upon light absorption.
![enter image description...
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Nicusor Timneanu (Uppsala University)25/06/2018, 17:00Contributed poster
Coherent diffractive imaging with X-ray lasers opened a bright avenue for determining atomic structure of biomolecules. It uses ultrashort and intense X-ray pulses to take snapshot pictures of biological samples, single particles or protein crystals, before these turn into a plasma due to the extreme radiation dose, aka diffraction before destruction. During destruction the atoms will ionize...
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Mr Zhou Shen25/06/2018, 17:00Contributed poster
To date, experiments at x-ray free-electron lasers have generated a very large amount of raw diffraction data. Whilst current pulsed x-ray laser sources measure diffraction patterns at an already very fast rate, with unprecedented development in the instrumentation this data collection rate is projected to rise at least an order of magnitude over the next few years. These large datasets are...
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Benedikt Daurer (National University of Singapore)25/06/2018, 17:00Contributed poster
The characterization of the wavefront dynamics is important for many X-ray free-electron laser (XFEL) experiments, in particular for coherent diffractive imaging (CDI), as the reconstructed image is always the product of the incoming wavefront with the object. An accurate understanding of the wavefront is also important to optimize peak power densities to make use of the tightest possible...
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Dr Mabel Ruiz-Lopez (DESY)25/06/2018, 17:00Contributed poster
The design of the new monochromator beamline FL23 at FLASH, the Free-electron LASer in Hamburg, is made up of 7 optical elements: an elliptical mirror, 2 variable-line-spaced gratings in diffraction order compensation, a vertical slit, a plane mirror and a Kirkpatrick-Baez (KB) focussing system. The monochromotor is designed to work in the soft X-ray range covering a spectral range from 1-20...
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Dr Tetiana Kulik (Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine)25/06/2018, 17:00Contributed poster
Nanoscale hybrid films manifest a set of properties that can beneficial when used in dye lasers, amplifiers, switching devices, solar cells, OLEDs. Studies on the fabrication of sol-gel optical hybrid SiO2 and TiO2 films for photovoltaic devices or planar optical waveguide are continuously caring attention over the years because this materials have numerous applications in the field of...
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Dr Mikhail Yurkov (DESY)25/06/2018, 17:00Contributed poster
The best way for planning user experiments would be performing start-to-endsimulations tracing radiation pulses from its origin (undulator) through a beamline (mirrors, monochromators etc) to a target, simulation of physical processes of the radiation interaction with a sample, and simulation of detection process of related debris (photon, electrons, ions, etc) by detectors. Modern FEL...
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Mr Thomas Ding (Max-Planck-Institute for nuclear physics)25/06/2018, 17:00Contributed poster
We present first XUV-pump/XUV-probe transient absorption spectroscopy experiments conducted at the free-electron laser FLASH. Exploiting the partial temporal coherence of the stochastic light fields, this scheme provides access to transient changes in the XUV spectra which are related to dynamics of electronic bound states on a timescale below the average pulse duration. Those transient...
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