Bonifacio, R. and Piovella, N. and Cola, M.M. and Volpe, L. and Schiavi, A. and Robb, G.R.M. (2008) The quantum free-electron laser. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 593 (1-2). pp. 69-74. ISSN 0168-9002Full text not available in this repository. (Request a copy from the Strathclyde author)
A Free-Electron Laser (FEL) operating in the quantum regime can provide a compact and monochromatic X-ray source. Here we review the basic principles of a high-gain quantum FEL starting from noise, with special emphasis on the self-amplified spontaneous emission (SASE) mode operation. In the first part, the full quantum theory of the N-particle and single-radiation-mode FEL Hamiltonian is presented. Quantum effects such as cooperative gain, discrete spectrum and line narrowing are described, both in the multi-particle and in the second quantization formalism. In the second part, propagation effects (i.e. slippage) are described and the main features of the quantum SASE regime are discussed. The broad and spiky radiation spectrum observed in the classical SASE reduces in the quantum regime to a series of narrow lines, associated to sequential transitions between adjacent momentum states. A simple interpretation of the discrete nature of the spectrum and of the line width of the single spike observed in the quantum regime is presented.
|Keywords:||SASE, X-ray laser, line width, Physics, Instrumentation, Nuclear and High Energy Physics|
|Subjects:||Science > Physics|
|Department:||Faculty of Science > Physics|
|Depositing user:||Strathprints Administrator|
|Date Deposited:||08 Jun 2010 08:47|
|Last modified:||22 Mar 2017 10:43|