Orateur
Description
FLASH at DESY in Hamburg has a unique FEL scheme, which includes XUV and THz undulators, providing soft X-Ray and intense tunable THz pulses at a high repetition rate simultaneously with low jitter [1]. The combination of XUV and THz pulses at FLASH enables time-resolved pump-probe experiments to study structural and electron dynamics of molecules[2,3], coherent control of magnetization dynamics[4], and study matter at extreme conditions[5]. The THz beam at FLASH1 has its own unique features of intense pulse energies up to 150µJ at high-repetition rates and tunable wavelengths from 300µm (1THz) to 10µm (30THz).
With the upcoming upgrade of the THz beamline within the 2020+ project, FLASH will provide seeded FEL pulses in the range between 3.6 nm – 60.9 nm, plus XUV 3rd harmonic reaches O k-edge, in combination with strong THz pulses in the range between 1 THz – 30 THz, tunable pump-probe laser and dedicated THz-XUV experimental endstations, opening new opportunities for most challenging ultrafast XUV-THz pump-probe experiments.
References:
[1] R. Pan, DESY: "Photon diagnostics at the FLASH THz beamline", J. Synchrotron Rad. 26, 700-707 (2019).
[2] U. Fruehling, DESY: Electronic decay in a dissociating molecule: THz streaking of core-excited HCl molecules”, Structural Dynamics, 6, 034301, (2019)
[3] M. Krikunova, Technische Universität Berlin: THz streak camera performance for single-shot characterization of XUV pulses with complex temporal structures, Opt. Express 28, 20686-20703 (2020).
[4] Liu, X., Jal, E., et al., Investigating Coherent Magnetization Control with Ultrashort THz Pulses. Appl. Sci. 2022, 12, 1323.
[5] S. Glenzer/Z. Chen, SLAC: Ultrafast Multi-cycle Terahertz Measurements of the Electrical Conductivity in Strongly Excited Solids Nat Commun 12, 1638 (2021)
| Affiliation de l'auteur principal | DESY |
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