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

Sujet: [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Auteur: Silly, Mathieu,, Ferté, Tom, Tordeux, Marie Agnès, Pierucci, Debora, Beaulieu, Nathan, Chauvet, Christian, Pressacco, Federico, Sirotti, Fausto, Popescu, Horia, Lopez-Flores, Victor, Tortarolo, Marina, Sacchi, Maurizio, Jaouen, Nicolas, Hollander, Philippe, Ricaud, Jean Paul, Bergeard, Nicolas, Boeglin, Christine, Tudu, Bharati, Delaunay, Renaud, Lüning, Jan, Malinowski, Grégory, HEHN, Michel, Baumier, Cédric, Fortuna, Franck, Krizmancic, Damjan, Stebel, Luigi, Sergo, Rudi, Cautero, Giuseppe
Résumé: The SOLEIL synchrotron radiation source is regularly operated in special filling modes dedicated to pump–probe experiments. Among others, the low-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-mode of the experimental setups 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: info:eu-repo/semantics/altIdentifier/doi/10.1107/S1600577517007913
Editeur: HAL CCSD, International Union of Crystallography