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9 June 2023 Enabling time-resolved experiments with ultrashort FEL pulses via the split-and-delay unit for FLASH2
M. Dreimann, D. Eckermann, S. Roling, T. Reiker, F. Rosenthal, F. Wahlert, M. Kuhlmann, S. Toleikis, R. Treusch, E. Plönjes, H. Zacharias
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Proceedings Volume 12581, X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation VI; 125810P (2023) https://doi.org/10.1117/12.2665626
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic
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Abstract
We present the temporal characteristics of the split-and-delay unit at FLASH2 via visibility measurements which characterize the temporal resolution of the combined system of the FEL and the split-and-delay unit. The use of the split-and-delay unit at FLASH2 allows the users at the beamlines FL23 and FL24 at DESY to perform such pump-probe experiments. By using wavefront beam splitting, grazing incidence mirrors, and two different coatings the whole spectral region of FLASH2 is covered, and even harmonics up to 1800 eV are transmitted with a transmission of T>0.06. It is concluded that user experiments with a pump-probe scheme from the picosecond regime down into the sub-femtosecond region can be carried out.
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M. Dreimann, D. Eckermann, S. Roling, T. Reiker, F. Rosenthal, F. Wahlert, M. Kuhlmann, S. Toleikis, R. Treusch, E. Plönjes, and H. Zacharias "Enabling time-resolved experiments with ultrashort FEL pulses via the split-and-delay unit for FLASH2", Proc. SPIE 12581, X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation VI, 125810P (9 June 2023); https://doi.org/10.1117/12.2665626
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KEYWORDS
Free electron lasers
Ultrafast phenomena
Temporal resolution
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