Application of nonlinear models to estimate the gain of one-dimensional free-electron lasers. (15th May 2017)

• Record Type: Journal Article
• Authors: Peter, E.; Rizzato, F. B.; Endler, A.
• Is Part Of: Journal of plasma physics. Volume 83:Number 3(2017)
• Publication Date: 2017-05-15
• Subjects: plasma applications, -- plasma devices; Plasma (Ionized gases) -- Periodicals; 530.4405
• DOI: 10.1017/S0022377817000356
• Languages: English
• ISSNs: 0022-3778

Abstract

Abstract : In the present work, we make use of simplified nonlinear models based on the compressibility factor (Peter et al., Phys. Plasmas, vol. 20 (12), 2013, 123104) to predict the gain of one-dimensional (1-D) free-electron lasers (FELs), considering space-charge and thermal effects. These models proved to be reasonable to estimate some aspects of 1-D FEL theory, such as the position $z$ of the onset of mixing, in the case of a initially cold electron beam, and the position $z$ of the breakdown of the laminar regime, in the case of an initially warm beam (Peter et al., Phys. Plasmas, vol. 21 (11), 2014, 113104). The results given by the models are compared to wave–particle simulations showing a reasonable agreement.