Forthcoming Events

22.04.2018 - 26.04.2018, Strasbourg Convention & Exhibition Centre, France
23.04.2018 - 26.04.2018, National University of Defence Technology, Changsha, Hunan China

News

New scientific highlights- by MUST PIs Ursula Keller, Thomas Feuer, Majed Chergui, Hans Jakob Wörner, Jean-Pierre Wolf and Ursula Röthlisberger
ERC Advanced Grants for Ursula Keller and Ruth Signorell- a major success for women scientists in the NCCR MUST
ETH WPF General Assembly - 28 March 2018Video-conferencing in Zürich and Lausanne
Peter Hamm selected as the 2018 recipient of the Ellis R. Lippincott Award (OSA)- for seminal contributions to developing multidimensional infrared, Raman and Terahertz spectroscopy
Thomas Feuer: Vortrag über THz Strahlung (in German)- in der Physikalischen Gesellschaft Zürich (PGZ)
Ursula Keller awarded the IEEE Photonics Award 2018 -for her work as a pioneer in the field of ultrafast lasers
Jean-Pierre Wolf to Receive ZEISS Research Award - for his groundbreaking application of laser pulses in researching the earth’s atmosphere
Three new scientific highlights- by MUST PIs Jean-Pierre Wolf, Majed Chergui / Rafael Abela / Chris Milne and Ursula Keller /Jörg Osterwalder / Matthias Hengsberger
Special Issue of Structural Dynamics on the NCCR MUST- with 10 reviews and 2 perspectives
Majed Chergui elected to the Royal Academy of Sciences of Spain - as successor to Ahmed Zewail (1999 Chemistry Nobel Laureate)
GAP-Biophotonics with Jean-Pierre Wolf-visited by the Grand Conseil of Geneva
First time resolved Pilot Experiment by SwissFEL (30.11.2017): Semiconductor to metal transition in Ti3O5 nanocrystals
ERC Consolidator Grant for Hans Jakob WörnerAttosecond X-ray spectroscopy of liquids ...

First time resolved Pilot Experiment by SwissFEL (30.11.2017):

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An important highlight for NCCR MUST was the first Pilot Experiment at the SwissFEL Bernina instrument lead by Henrik Lemke associate PI of MUST. The group picture includes the PSI MUST senior people. The three young scientists in the center have worked hard for this experiment and all three are MUST Postdocs: Cristian Sevtina, Giulia Mancini, Roman Mankowsky.

On the 30th of November 2017 SwissFEL saw its first time resolved pilot experiment in the Bernina experimental station of the SwissFEL ARAMIS beamline. A team of scientists from the University of Rennes, ESRF and PSI, led by Marco Cammarata (Univ. Rennes) and Henrik Lemke (PSI), successfully started the experimental phase at SwissFEL. The goal was to study the picosecond dynamics of a light-induced phase transition from a semiconductor to metallic crystal structure in a Titanium Oxide (D). In nanoparticles, the transition occurs reversibly and may be interesting for data storage applications. The transition was studied by powder X-ray diffraction using the 3rd Harmonic 6.6 KeV Photons (~+1%p4 or2f r(fuf2ndc3amb%enu-tat+l o9@ a)2.s92 y%Kes5V a622k.0 fμJ) of SwissFEL (A: Diffraction image, 100 pulse average ). After excitation with infrared laser light (800nm, 42 mJ/cm2), changes in the Debye-Scherrer diffraction rings indicate the transient population changes in the different phases (B). A cascade of dynamic processes from few picosecond acoustic lattice deformation to phase transition from ~10 picosecond to microsecond timescale could be observed (B/C). Once fully analyzed the scientists hope to fully describe the time scale and mechanisms of the photo transformation.

The SwissFEL Bernina experimental station headed by Gerhard Ingold and Henrik Lemke is designed for femtosecond pump-probe experiments in condensed matter and material science, employing photon-in photon-out techniques in the energy range 4 – 12.4 keV. It includes a femtosecond optical laser system to generate a variety of pump beams (from the UV up to the THz range), an X-ray optical scheme to tailor the X-ray probe beam, shot-to-shot diagnostics to monitor the X-ray intensity and arrival time, as well as two endstations operated at a single focus position with spot size of 2-200 μm. The general purpose endstation was used for the first pilot experiment.

This work was performed in the frame of the CNRS IM-LED LIA, in collaboration with prof. Shin-ichi Ohkoshi & Hiroko Tokoro (Tokyo University) who kindly provided samples.


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