Modelling of free-electron maser based on two-dimensional distributed feedback

Journal article

The use of two-dimensional (2D) distributed feedback has been considered as a method of providing spatially coherent radiation from an oversized annular electron beam used to drive a FEM based on a coaxial two-mirror cavity. The operation of the FEM when the interaction space is formed by a 2D Bragg input and a 1D Bragg output mirror separated by a regular section of the coaxial waveguide has been studied using the 3D Particle-in-Cell code MAGIC. The properties of the FEM are analyzed and discussed. The single mode operation of the FEM that uses a coaxial cavity is demonstrated and the design of a 2D Bragg FEM-oscillator based on a high-current accelerator is discussed.

Authors: Konoplev, I; Phelps, A; Cross, A; MacInnes, P

• Journal: IRMMW-THz2007 - Conference Digest of the Joint 32nd International Conference on Infrared and Millimetre Waves, and 15th International Conference on Terahertz Electronics
• Pages: 839-840
• Publication date: 2007-01-01
• Language: English
• Keywords: Numerical simulations; Distributed feedback oscillators; Free electron masers; Distributed Bragg reflectors