FASEM - Joint French-Swedish school on X-rays and Neutrons techniques for the study of functional materials for energy

Europe/Stockholm
5th Floor (LINXS)

5th Floor

LINXS

Delta 5, 5th and 6th floor, IDEON Building:, Scheelevägen 19, 223 70 Lund
Christine Darve (European Spallation Source ERIC), Ken Andersen (European Spallation Source ERIC), Marie Plazanet (Laboratoire Interdisciplinaire de Physique Université Grenoble Alpes), Sandrine Testaz (French Embassy), Yves Poncon (French Embassy)
Description

This advanced school on X-rays and Neutrons techniques for the study of functional materials for energy is jointly organized by Swedish and French universities and research organisms.

 

Materials for the production, processing, storage or transportation of energy are essential components for current societal challenges. Knowledge of structural organization and dynamics at the atomic scale is therefore an essential prerequisite for the study of these materials, and is based, not exclusively but largely, on the use of short-wave radiation, neutrons or X-rays. Thus, an important aspect of the proposed school is to emphasize the complementarity between similar techniques based on one or the other of the radiations, too often ignored.

 

==> Official site: https://fasem.sciencesconf.org/

    • 09:00 10:00
      Interaction X-rays and neutrons with matter - Jean Daillant (Soleil synchrotron) 1h

      The aim of the lecture will be both to provide the attendees with solid yet simple principles to understand x-ray and neutron scattering and give them a flavor of more sophisticated applications.

      After a short introduction to synchrotron radiation and neutrons, I will discuss the interaction of x-rays and neutrons with matter.

      Starting from a geometrical description, I will first emphasize similarities between x-ray and neutron scattering.

      Differences will then be discussed using a more detailed description of interactions. Based on this analysis, I will discuss when x-rays or neutrons should be better used to tackle a given scientific question.

      The lecture will be illustrated with numerous examples, mostly in soft-condensed matter.

    • 10:00 11:00
      Diffraction with X-rays and neutrons - Claire Colin (Institut Néel, Grenoble) 1h
    • 11:00 11:30
      Coffee break 30m
    • 11:30 12:00
      Example I: multiferroics materials - Claire Colin (Institut Néel, Grenoble) 30m
    • 12:00 12:45
      Example II: materials for batteries - Gwaenaelle Rousse ( Sorbonne University) 45m

      This course will present the different battery technologies (Li-ion, Na-ion, all-solid-state batteries) and the materials used as electrodes and solid state electrolytes in those systems. Emphasis will be put on the main challenges faced to increase the battery performances, and how neutrons can be useful for tacking them.

    • 12:45 14:00
      Lunch 1h 15m
    • 14:00 14:45
      Introduction to small-angle scattering - the use of X-rays and Neutrons - Stephan Roth (KTH, Stockholm) 45m
    • 14:45 15:30
      Using neutrons to look at molecules in confinement - Heloisa N. Bordallo (Niels Bohr Institute) 45m
    • 15:30 16:00
      Coffee break 30m
    • 16:00 16:45
      Example II: Application of small angle scattering X/n for the study of skyrmionics - Jonathan White 45m
    • 16:45 18:00
      Students presentation - (5mn per student)
    • 09:00 10:00
      Spectroscopy, inelastic scattering - Matteo D’Astuto (Institut Néel, Grenoble) 1h

      In the first part of this lecture I will introduce general concepts with a particular focus on the difference between resonant and non-resonant scattering of X-rays.

    • 10:00 10:30
      Theory of functional magnetic materials, from x-ray spectroscopy and neutron scattering to magnetocaloric refrigeration - Olle Eriksson (Uppsala University) 30m
    • 10:30 11:00
      Coffee break 30m
    • 11:00 12:30
      Students presentation - (5mn per student)
    • 12:30 14:00
      Lunch 1h 30m
    • 14:00 14:45
      Example I : RIXS/INS for superconductivity - Matteo D’Astuto (Institut Néel, Grenoble) 45m

      I will then give some example of non-resonant scattering of X-rays. I will show in particular how this gives conceptually similar results to inelastic neutron scattering (INS) in the case of phonons. With example on superconductors, I will highlight the technical difference justifying the choice of X-ray or neutron as probe, depending on the material, the environment and the specific details of the phonon dispersion of interest.

      In the second part of the lecture I will focus on the resonant scattering of X-rays, and the information that can be obtained with Resonant Inelastic X-ray Scattering (RIXS), in particular why this will give access to magnetic excitation and compare the results to INS for spin-wave dispersion in cuprate high temperature superconductors.

    • 14:45 15:45
      Example II : relaxation, QENS and ionic liquids - Alexander Matic (Chalmers Unversity) 1h

      Relaxation, QENS and ionic liquid

      Ionic liquids are salts with a melting temperature below 100°C and are of high interest as electrolytes for future energy technology. The interest arises from intrinsic properties such as high ionic conductivity, good electrochemical stability, negligible vapour pressure and non-flammability. In this lecture we will look into how neutrons and x-rays can be used to understand structure and dynamics on the mesoscale in ionic liquids and their link to the functional properties.

    • 15:45 16:15
      Coffee break 30m
    • 16:15 17:00
      X-ray based spectroscopy for the study of perovskite photovoltaic materials - Håkan Rensmo (Uppsala University) 45m
    • 17:00 17:30
      In-situ measurements - Stephen Hall 30m
    • 09:00 10:00
      Surface science technics - Frederic Ott (LLB, Saclay) 1h
    • 10:00 10:45
      Example I : reflectivity for batteries - Thomas Saerbeck (ILL) 45m
    • 10:45 11:15
      Coffee break 30m
    • 11:15 12:00
      Photoemission and angle-resolved photoemission : A tool to probe the electronic structure of materials - Patrick Le Fèvre (SOLEIL synchrotron) 45m

      XPS
      Photoemission is based on the photoelectric effect. An incident photon is absorbed by an atom which uses its energy hν to emit an electron. In a photoemission experiment, this photoelectron is collected by an analyzer able to measure its kinetic energy as well as, in angle-resolved photoelectron spectroscopy (ARPES), its emission angle. In this lecture, we will describe this process and the information contained in photoemission spectra.

      One can first make a clear difference between the observation of core levels, atomic-like electrons described by the usual quantum numbers n, l and ml, and the more or less delocalized valence electrons described by their binding energy and their wavevector k.

      Core level spectroscopy gives a quite direct access to the local chemical environment of the excited atom. They can also be measured in a pump-probe experiment, where a pulse of UV or visible light prepares the material into an excited state (pump) prior to its analysis by photoemission with a soft X-ray photon (probe). Variation of core level binding energy with the time delay between the pump and the probe allows for a measurement of the excited state lifetime, a key parameter for materials to be used in solar cells or for hydrogen production by water photoelectrolysis.

      On valence states, ARPES is a unique tool to give an image of the material band structure. The basis of this technique will also be described.

    • 12:00 12:45
      Photo emission and absorption on catalysts - Jonas Weissenrieder (KTH, Stockholm) 45m
    • 12:45 14:00
      Lunch 1h 15m
    • 14:00 18:00
      Work on collaborative projects between participants
    • 09:00 10:00
      University Industry Knowledge Transfer: Institutional & Organizational Factors - Devrim Göktepe-Hultén (Lund University) 1h
    • 10:00 11:00
      Imagery X-rays and neutrons - Nikolay Kardjilov (Helmholtz-Zentrum Berlin) 1h
    • 11:00 11:30
      Coffee break 30m
    • 11:30 12:30
      Coherent X-rays - Gerardina Carbone (MAX-IV) 1h
    • 12:30 12:45
      Best project award ceremony
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