Pump − probe experiments at the TEMPO beamline using the low- α operation mode of Synchrotron SOLEIL

The SOLEIL synchrotron radiation source is regularly operated in special filling modes dedicated to pump – probe experiments. Among others, the low- α mode operation is characterized by shorter pulse duration and represents the natural bridge between 50   ps synchrotron pulses and femtosecond experiments. Here, the capabilities in low- α mode of the experimental set-ups developed at the TEMPO beamline to perform pump – probe experiments with soft X-rays based on photoelectron or photon detection are presented. A 282   kHz repetition-rate femtosecond laser is synchronized with the synchrotron radiation time structure to induce fast electronic and/or magnetic excitations. Detection is performed using a two-dimensional space resolution plus time resolution detector based on microchannel plates equipped with a delay line. Results of time-resolved photoelectron spectroscopy, circular dichroism and magnetic scattering experiments are reported, and their respective advantages and limitations in the framework of high-time-resolution pump – probe experiments compared and discussed.

Source: Journal of Synchrotron Radiation - June 15, 2017 Category: Physics Authors: Silly, M.G. Fert é , T. Tordeux, M.A. Pierucci, D. Beaulieu, N. Chauvet, C. Pressacco, F. Sirotti, F. Popescu, H. Lopez-Flores, V. Tortarolo, M. Sacchi, M. Jaouen, N. Hollander, P. Ricaud, J.P. Bergeard, N. Boeglin, C. Tudu, B. Delaunay, R. Luning, J. Ma Tags: time-resolved spectroscopy pump – probe experiments beamlines Source Type: research