Speaker
Dr
Christopher Milne
(Paul Scherrer Institut)
Description
With their unique combination of high per-pulse X-ray flux and femtosecond pulse durations, hard X-ray free electron lasers are an almost ideal source for time-resolved structural experiments. The SwissFEL, which is currently under construction at PSI, will be capable of generating femtosecond hard x-rays pulses in the photon energy range of 2-12 keV, with a planned emphasis on performing femtosecond pump-probe measurements. SwissFEL will take advantage of the significant local expertise at PSI in time-resolved X-ray measurements, X-ray spectrometer development, X-ray detector development and energy research. Experimental Station A (ESA) of the SwissFEL will focus on probing the ultrafast dynamics of systems in solution using a combination of X-ray spectroscopy and scattering. The primary goal of ESA will to enable users to perform X-ray absorption (XAS) and emission (XES/RIXS) spectroscopy pump-probe experiments with a focus on the 2-5 keV energy range with <50 fs time resolution (FWHM) using a range of excitation wavelengths (UV to IR). ESA will also be capable of using advanced methods for the injection of aerosol particles and sub-micron protein crystals. This poster will provide an overview of the techniques we expect to have available at ESA and will present a prototypical ‘ESA experiment’ which uses a combination of femtosecond X-ray diffraction, scattering, and spectroscopy to investigate the electronic and structural dynamics in photoexcited titania (TiO2) on the very shortest of timescales.
Primary author
Dr
Christopher Milne
(Paul Scherrer Institut)
Co-authors
Bill Francesco Pedrini
(Paul Scherrer Institut)
Bruce Patterson
(Paul Scherrer Institut)
Luc Patthey
(Paul Scherrer Institut)
Dr
Rafael Abela
(PSI)
