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.
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)
