Abstract
High-order harmonic beam was injected as a seeding source to a 250-MeV free-electron-laser amplifier. When the amplification conditions were satisfied, strong enhancement of the radiation intensity by a factor of 650 was observed at a wavelength of 61.5 nm. The random and uncontrollable spikes, which appeared in the spectra of the Self-Amplified Spontaneous Emission based FEL radiation without the seeding pulse, were found to be suppressed drastically to form to a narrow-band, single peak profile at the seeding wavelength. The properties of the seeded FEL radiation were well reproduced by numerical simulations.
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© 2012 Springer-Verlag Berlin Heidelberg
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Takahashi, E.J. et al. (2012). Enormous Amplification of Full-Coherent Radiation in the Extreme Ultraviolet Region with a Free-Electron Laser. In: Yamanouchi, K., Katsumi, M. (eds) Multiphoton Processes and Attosecond Physics. Springer Proceedings in Physics, vol 125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28948-4_25
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DOI: https://doi.org/10.1007/978-3-642-28948-4_25
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