EELECTROMECHANICAL SELF-OSCILLATING SYSTEMS WITH FLEXIBLE FIELD ELECTRON EMITTERS

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Abstract

The paper presents the results of an experimental and theoretical study of electromechanical self- oscillations in systems consisting of a vacuum diode with a flexible field emission cathode, depending on its elastic properties and ability to deform. Self-oscillation regime experimentally demonstrated for field electron emitters based on carbon nanotubes and diamond microneedles. A mathematical model is developed to describe the electromechanical processes in the self-oscillating systems under consideration. Based on the analysis of the experimental data and simulation results, it is shown that the excitation of self-oscillations in a system with a flexible field emission cathode is determined by a combination of system parameters that result in a negative effective damping coefficient. The potential practical applications of self-oscillations of field emission cathodes in various micro- and nano-electromechanical systems are explored.

About the authors

V. I. Kleshch

Department of Physics, Lomonosov Moscow State University

Email: klesch@polly.phys.msu.ru
Russian Federation, 119991, Moscow

A. N. Obraztsov

Department of Physics, Lomonosov Moscow State University

Author for correspondence.
Email: klesch@polly.phys.msu.ru
Russian Federation, 119991, Moscow

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