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The Femtosecond X‐ray Experiments (FXE) instrument at the European X‐ray Free‐Electron Laser (EuXFEL) provides an optimized platform for investigations of ultrafast physical, chemical and biological processes. It operates in the energy range 4.7–20 keV accommodating flexible and versatile environments for a wide range of samples using diverse ultrafast X‐ray spectroscopic, scattering and diffraction...
We present the first streaking of an attosecond pulse train using an intense THz field. Streaking with THz enables temporal characterization of the full pulse train in a single shot measurement.
We demonstrate non-resonant magnetization dynamics in the ferromagnetic cobalt thin film induced by a high-field Terahertz pulse. The magnetization dynamics are coherent and exactly follow the THz carrier oscillations.
Free Electron Lasers (FELs) are the next generation of large scale facilities that delivers ultra-short and bright pulses down to hard x-rays with unprecedented peak brilliance. Nowadays, FELs emitting in the soft and hard X-ray region are based on noise amplification (SASE FELs) suffering from partial longitudinal coherence, temporal jitter and other related problems.
Quantum efficiency studies for various laser wavelengths and various technical metal surfaces were carried out in a dedicated unbaked vacuum chamber in the absence of a significant electrical field. Copper, magnesium, aluminum, and aluminum–lithium photocathodes were irradiated by two different high power, high repetition rate, laser systems. We have observed an emission of electrons for photon energies...
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