Abstract
We present a unified model and analysis of radiation modes excitation in free-electron lasers with a periodically premodulated electron beam. The formulation characterizes superradiant coherent radiation emission from electron beam prebunched at the synchronous frequency, including the case of stimulated superradiant where in addition to a prebunched electron beam an electromagnetic wave is injected into the undulator region. The derived formulation of radiation mode excitation by currents is applicable to general structures that can support orthogonal eigenmodes.
Highlights
The subject of electromagnetic radiation emission by relativistic charged particles is a fundamental problem of classical electrodynamics [1,2]
The formulation characterizes superradiant coherent radiation emission from electron beam prebunched at the synchronous frequency, including the case of stimulated superradiant where in addition to a prebunched electron beam an electromagnetic wave is injected into the undulator region
In free-electron lasers (FELs) the electromagnetic radiation can be extracted in several different schemes from an electron beam, which passes through a magnetic undulator
Summary
The subject of electromagnetic radiation emission by relativistic charged particles is a fundamental problem of classical electrodynamics [1,2]. Since the e-beam bunching is the driver of the radiation process, the concept of electron beam prebunching was derived as means for enhancing the radiative emission process and generation of harmonics [15,16,17,18,19,20,21,22,23,24,25,26,27,28] In this case the longitudinally coherent radiation emission process does not require insertion of an external electromagnetic wave field. In their paper the authors developed a nonlocal theory of a free-electron laser driven by a prebunched electron beam in a cylindrical waveguide, and they studied the three-wave nonlinear coupling involving a magnetostatic wiggler, a negative beam space charge wave, and an electromagnetic signal in the collective Raman and Compton regimes. This will allow the verification of the analytical formulation obtained in the previous stages
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physical Review Special Topics - Accelerators and Beams
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
