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Physical Review Special Topics. Accelerators and Beams | Vol.12, Issue.6 | 2017-05-30 | Pages

Free electron laser with terahertz band Bragg reflectors

Naum S. Ginzburg,Andrey M. Malkin,Nikolay Yu. Peskov,Alexandr S. Sergeev,Vladislav Yu. Zaslavsky,Keichi Kamada,Ritoku Ando

Abstract

Periodical Bragg structures may be considered as an effective way of controlling the electromagnetic energy fluxes and provision of spatially coherent radiation in the free electron lasers with oversized interaction space. A new scheme of terahertz band FEL with hybrid Bragg resonator is proposed consisting of advanced input Bragg mirror and traditional output Bragg mirror. An advanced Bragg mirror exploiting the coupling between the two counterpropagating modes and the quasicutoff one provides mode selection over the transverse index. The main amplification of the wave by the electron beam takes place in the regular section of the resonator. Small reflections from the output traditional Bragg mirror are sufficient for oscillator self-excitation.

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Free electron laser with terahertz band Bragg reflectors

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Keywords

output bragg mirror one counterpropagating oversized interaction hybrid bragg resonator spatially coherent radiation band fel electromagnetic energy fluxes free electron lasers

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Naum S. Ginzburg,Andrey M. Malkin,Nikolay Yu. Peskov,Alexandr S. Sergeev,Vladislav Yu. Zaslavsky,Keichi Kamada,Ritoku Ando,.Free electron laser with terahertz band Bragg reflectors. 12 (6),.

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