3 papers
math-ph2026
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…
physics.plasm-ph2025
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…
physics.plasm-ph2024
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…