6 citations · 9 across the 7 of their papers we have counts for
7 papers
Floquet Theory of the LC Circuit with Modulated Capacitance
Alexander Figotin
Parametric resonance -- periodic variation of a system parameter driving exponential growth of oscillations -- is among the most fundamental instabilities in physics and engineerin…
Super-exponential Amplification of Wavepacket Propagation in Traveling Wave Tubes
Kasra Rouhi, Filippo Capolino, Alexander Figotin
We analyze wavepacket propagation in traveling wave tubes (TWTs) analytically and numerically. TWT design in essence comprises a pencil-like electron beam in vacuum interacting wit…
Small-Signal Model for Inhomogeneous Helix Traveling-Wave Tubes using Transfer Matrices
Robert Marosi, Kasra Rouhi, Tarek Mealy +2
Abstract We introduce a practical method for modeling the small-signal behavior of frequency-dispersive and inhomogeneous helix-type traveling-wave tube (TWT) amplifiers based on a…
Simple Reciprocal Electric Circuit Exhibiting Exceptional Point of Degeneracy
Kasra Rouhi, Filippo Capolino, Alexander Figotin
An exceptional point of degeneracy (EPD) occurs when both the eigenvalues and the corresponding eigenvectors of a square matrix coincide and the matrix has a nontrivial Jordan bloc…
Factorized form of the dispersion relations of a traveling wave tube
Alexander Figotin
The traveling tube (TWT) design in a nutshell comprises of a pencil-like electron beam (e-beam) in vacuum interacting with guiding it slow-wave structure (SWS). In our prior studie…
The Field Theory of Collective Cherenkov Radiation Associated with Electron Beams
Edl Schamiloglu, Alexander Figotin
Classical Cherenkov radiation is a celebrated physics phenomenon of electromagnetic (EM) radiation stimulated by an electric charge moving with constant velocity in a three dimensi…
Lagrangian Framework for Systems Composed of High-Loss and Lossless Components
Alex Figotin, Aaron Welters
Using a Lagrangian mechanics approach, we construct a framework to study the dissipative properties of systems composed of two components one of which is highly lossy and the other…