News

Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize- for pioneering work in ultrafast lasers
MUST2022 Conference- a great success!
New scientific highlights- by MUST PIs Wörner, Chergui, and Richardson
FELs of Europe prize for Jeremy Rouxel- “Development or innovative use of advanced instrumentation in the field of FELs”
Ruth Signorell wins Doron prizefor pioneering contributions to the field of fundamental aerosol science
New FAST-Fellow Uwe Thumm at ETH- lectures on Topics in Femto- and Attosecond Science
International Day of Women and Girls in Science- SSPh asked female scientists about their experiences
New scientific highlight- by MUST PIs Milne, Standfuss and Schertler
EU XFEL Young Scientist Award for Camila Bacellar,beamline scientist and group leader of the Alvra endstation at SwissFEL
Prizes for Giulia Mancini and Rebeca Gomez CastilloICO/IUPAP Young Scientist Prize in Optics & Ernst Haber 2021
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List- for the development of asymmetric organocatalysis
NCCR MUST at Scientifica 2021- Lightning, organic solar cells, and virtual molecules

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 (~91%q2 oa3f t%fur4ndr+amh)enl-tah+l v)@ s.2.f82 y7Key.V c&22a*0 cμJ) 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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