From linearity towards chaos: Basic studies of relativistic backward-wave oscillators
Antonsen, T. Jr.
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Recent experimental studies have revealed for the first time some basic features of pulsed. relativistic (300-600 keY) backward-wave oscillators such as starting current, axial mode locking, and multifrequency operation. Above a critical beam current a gradual degradation of the spectral purity of the electromagnetic radiation is observed, culminating in the onset of stochastic oscillations.