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 ITEM 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.
|Title of host publication||2007 Joint 32nd International Conference on Infrared and Millimeter Waves/15th International Conference on Terahertz Electronics|
|Place of Publication||New York, USA|
|Number of pages||3|
|Publication status||Published - 2007|
- free electron masers
- distributed Bragg reflectors
- distributed feedback oscillators
- numerical simulations
Konoplev, I. V., Phelps, A. D. R., Cross, A. W., & MacInnes, P. (2007). Modelling of free-electron maser based on two-dimensional distributed feedback. In 2007 Joint 32nd International Conference on Infrared and Millimeter Waves/15th International Conference on Terahertz Electronics (pp. 830-833). New York, USA: IEEE.