Feedback Stabilization of a Drift-Type Instability
Phys. Rev. Lett. 22, 1171 – Published 2 June, 1969
DOI: https://doi.org/10.1103/PhysRevLett.22.1171
Abstract
Low-frequency electrostatic waves in a reflex discharge are stabilized by feeding an amplified and phase-shifted probe signal to a pair of plates at the discharge walls. The plates couple electrostatically to the drift-type modes and stabilize them, giving a modest increase in density. A root-locus diagram is devised to explain the observed features of the system response.