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Characterization of stationary and nonstationary behavior in gyrotron oscillators
T H Chang1, S H Chen, L R Barnett
1Department of Physics, National Tsing Hua University, Hsinchu, Taiwan.
Physical Review Letters
|August 11, 2001
Abstract:
The transition from the stationary state to a sequence of nonstationary states in the gyromonotron oscillator is experimentally characterized for the first time. We have also demonstrated the stationary operation of a gyrotron backward-wave oscillator at a beam current far in excess of the generally predicted nonstationary threshold. This difference in nonlinear behavior has been investigated and shown to be fundamental with a comparative analysis of the feedback mechanisms, energy deposition profiles, and field shaping processes involved in these two types of oscillations.