Gregor Knopp

Capturing macromolecular dynamics using time-resolved serial crystallography at X- ray free electron lasers and synchrotron light sources

Sandra TM Mous, Guillaume Gotthard, D. Ehrenberg, Saumik Sen et autres

In recent years, time-resolved serial crystallography has emerged as a transformative technique for unraveling the intricate dynamics of macromolecules at atomic resolution. By leveraging the high-intensity and ultra-short pulses of X-ray free electron lasers (XFELs) alongside the high brilliance of synchrotron light …

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An excitonic coupling to the haem governs the ultrafast tryptophan fluorescence decay of tryptophan in Cytochrome c

Camila Bacellar, Jérémy R. Rouxel, Rebecca A. Ingle, Giulia F. Mancini et autres

Processed XAS and XES data from the manuscript "An excitonic coupling to the harm governs the ultrafast tryptophan fluorescence decay in Cytochrome c" and corresponding scripts used to analyse the data and produce the figures. Raw data generated at SwissFEL (PSI) and …

Towards the Perfect X-ray Beam Splitter

Sven Reiche, Gregor Knopp, Bill Pedrini, Eduard Prat et autres

X-ray free-electron lasers (FEL) deliver ultrabright X-ray pulses, but not the sequences of phase-coherent pulses required for time-domain interferometry and control of quantum states. For conventional split-and-delay schemes to produce such sequences the challenge stems from extreme stability requirements when splitting Angstrom …

POTENTIAL CURVE OF GROUND STATE Cu2 UP TO 98% OF THE DISSOCIATION ENERGY

Peter Radi, Christophe Gourlaouen, Roberto R. Marquardt, Gregor Knopp et autres

We report on an experimental and theoretical investigation of the ground electronic potential of dicopper. By taking into account our recent deperturbation study of the high lying energy map,\\footnote{Beck, M., P. Bornhauser, Bradley Visser, G. Knopp, J. A. van Bokhoven, and P. …

Revealing hole trapping in zinc oxide nanoparticles by time-resolved X-ray spectroscopy

Thomas J. Penfold, Jakub Szlachetko, Wojciech Gawełda, Fabio Santomauro et autres

Abstract Nanostructures of transition metal oxides, such as zinc oxide, have attracted considerable interest for solar-energy conversion and photocatalysis. Both applications are sensitive to the transport and trapping of photoexcited charge carriers. The probing of electron trapping has recently become possible using …

SwissFEL: The Swiss X-ray Free Electron Laser

Christopher Jackson Milne, Thomas Schietinger, M. Aiba, Arturo Alarcon et autres

The SwissFEL X-ray Free Electron Laser (XFEL) facility started construction at the Paul Scherrer Institute (Villigen, Switzerland) in 2013 and will be ready to accept its first users in 2018 on the Aramis hard X-ray branch. In the following sections we will …

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Chemical analyses of micrometre-sized solids by a miniature laser ablation/ionisation mass spectrometer (LMS)

Marek Tulej, Reto Wiesendanger, M. B. Neuland, Stefan Meyer et autres

Charged particle velocity map image reconstruction with one-dimensional projections of spherical functions

T. Gerber, Yuzhu Liu, Gregor Knopp, Patrick Hemberger et autres

Velocity map imaging (VMI) is used in mass spectrometry and in angle resolved photo-electron spectroscopy to determine the lateral momentum distributions of charged particles accelerated towards a detector. VM-images are composed of projected Newton spheres with a common centre. The 2D images …

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Studies of Ter-Butyl-Peroxy and Hexadiyne by dispersed fs-FWM methods

Gregor Knopp, P. Radi, András Bödi, Melissa Johnson et autres

Di-Tert-Butyl-Peroxide Di-tert-butyl peroxide (DTBOO) a sufficiently stable molecule is a good candidate as precursor for the production and investigation of C4 – OO peroxy radicals. The most prominent absorption ( *-*) in DTBOO is in the UV spectral range between 340 nm …

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