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Theory and simulations of a gyrotron backward wave oscillator using a helical interaction waveguide

Cross, A.W. and Phelps, A.D.R. and Ronald, K. and He, W. and Whyte, C. and Robertson, C.W. and Young, A.R. (2006) Theory and simulations of a gyrotron backward wave oscillator using a helical interaction waveguide. Applied Physics Letters, 89 (9). ISSN 0003-6951

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    A gyrotron backward wave oscillator (gyro-BWO) with a helically corrugated interaction waveguide demonstrated its potential as a powerful microwave source with high efficiency and a wide frequency tuning range. This letter presents the theory describing the dispersion properties of such a waveguide and the linear beam-wave interaction. Numerical simulation results using the PIC code MAGIC were found to be in excellent agreement with the output measured from a gyro-BWO experiment.