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TY - UNPB AU - Hajima, R. ED - Chin, Yong Ho ED - Zhao, Zhentang ED - Petit-Jean-Genaz, Christine ED - Schaa, Volker RW TI - CEP-Stabilized Few-cycle MIR-FELs for Driving High-Repetition-Rate (>10 MHz) Attosecond X-ray Sources Based on HHG J2 - Proc. of FLS2018, Shanghai, China, 5-9 March 2018 C1 - Shanghai, China T2 - ICFA Advanced Beam Dynamics Workshop T3 - 60 LA - english AB - High harmonic generation (HHG) is a well-established technology to produce attosecond pulses in VUV wavelengths. So far HHG sources have been driven by femtosecond solid-state lasers not FELs, because it has been believed that FELs have no ability to provide carrier-envelope-phase (CEP) stabilized few-cycle pulses essential to the HHG. Here, we propose a scheme to CEP stabilized few-cycle pulses from a FEL oscillator. Operated at a mid-infrared wavelength, the proposed method is able to drive a HHG photon source to produce isolated attosecond pulses at photon energies above 1 keV with a repetition > 10 MHz. The FEL-HHG photon source will open a door to full-scale experiments of attosecond X-ray pulses and push ultrafast laser science to the zeptosecond regime [1]. PB - JACoW Publishing CP - Geneva, Switzerland ER -