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Quantum theory of SASE FEL

Bonifacio, R. and Piovella, N. and Robb, G.R.M. (2005) Quantum theory of SASE FEL. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 543 (2-3). pp. 645-652. ISSN 0168-9002

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We describe a free-electron laser (FEL) in the Self-Amplified Spontaneous Emission (SASE) regime quantizing the electron motion and taking into account propagation effects. We demonstrate quantum purification of the SASE spectrum, i.e. in a properly defined quantum regime the spiking behavior disappears and the SASE power spectrum becomes very narrow.