Barkauskas, MBrandi, FGiammanco, FNeshev, DragomirPirri, AUbachs, Wim2015-12-130368-2048http://hdl.handle.net/1885/81324At the Laser Centre Vrije Universiteit a table-top size, tunable and narrowband laser-based source of extreme ultraviolet radiation was developed using high-harmonic generation of powerful laser pulses of 300 ps duration and Fourier-transform limited bandwidth. The generated radiation has unprecedented spectral purity of λ/Δλ>2.5×105 at wavelengths covering the entire tunability range of 40-100 nm. The process of high-order harmonic generation was investigated in different gases (Ar, Kr, Xe, N 2) uncovering resonance phenomena for the conversion efficiency of specific harmonic orders.Keywords: Fourier transforms; Frequency domain analysis; Harmonic generation; Resonance; Spectroscopic analysis; Ultraviolet radiation; Extreme ultraviolet radiation; High-harmonic generation (HHG); Laser spectroscopy; Picosecond laser pulses; Laser pulses Extreme ultraviolet radiation; High-harmonic generation; Laser spectroscopy200510.1016/j.elspec.2005.01.2082015-12-11