Phys. Rev. Lett. 95, 185101 (2005) [4 pages]Dynamics of Mode Competition in the Gyrotron Backward-Wave OscillatorReceived 3 June 2005; published 27 October 2005 The axial modes of the gyrotron backward-wave oscillator (gyro-BWO) each exhibit a distinctive asymmetry in axial field profile. As a result, and in sharp contrast to the behavior of the familiar resonator-based gyrotron oscillator, particle simulations of the gyro-BWO reveal a radically different pattern of mode competition in which a fast-growing and well-established mode is subsequently suppressed by a later-starting mode with a more favorable field profile. This is verified in a Ka-band experiment and the interaction dynamics are elucidated with a time-frequency analysis. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.185101
DOI:
10.1103/PhysRevLett.95.185101
PACS:
84.40.Ik, 84.40.Fe
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