Abstract
This chapter presents the HHG driving pulse optimization results. The intensity and short pulse requirements to reach higher soft X-ray energies and better conversion ratio are discussed and different approaches are introduced. The previous, demanding, time-resolved X-ray absorption spectroscopy experiment in the gas phase leaned towards the option for an easy pulse shortening scheme. The adopted two-stage pulse broadening by filamentation coupled to a very simple post-compression technique is environmentally robust and leads to a 0.2 TW sub-two-cycle short-wavelength infrared pulse. The latter can drive high-order harmonics beyond the oxygen K absorption edge with similar flux conditions as obtained during the successful gas dissociation measurements at the carbon K-edge.
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Schmidt, C. (2021). Pulse Peak Power Optimization with Filamentation. In: Time-Resolved Soft X-Ray Absorption Spectroscopy of Molecules in the Gas and Liquid Phases. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-030-67838-8_5
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