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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
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