9 May 2013 Generation of attosecond soft x-ray pulses in a longitudinal space charge amplifier
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A longitudinal space charge amplifier (LSCA), operating in soft x-ray regime, was recently proposed. Such an amplifier consists of a few amplification cascades (focusing channel and chicane) and a short radiator undulator in the end. Broadband nature of LSCA supports generation of few-cycle pulses as well as wavelength compression. In this paper we consider an application of these properties of LSCA for generation of attosecond x-ray pulses. It is shown that a compact and cheap addition to the soft x-ray free electron laser facility FLASH would allow to generate 60 attosecond (FWHM) long x-ray pulses with the peak power at 100 MW level and a contrast above 98%.
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M. Dohlus, M. Dohlus, E. A. Schneidmiller, E. A. Schneidmiller, M. V. Yurkov, M. V. Yurkov, } "Generation of attosecond soft x-ray pulses in a longitudinal space charge amplifier", Proc. SPIE 8779, Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III, 87791S (9 May 2013); doi: 10.1117/12.2017018; https://doi.org/10.1117/12.2017018

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