A Study on the Spectra of Open Cavities and Numerical Simulation
Date Issued
2016
Date
2016
Author(s)
Liu, Yi-Li
Abstract
The main contents of this thesis around the open cavity, open cavities are commonly used in gyromonotron oscillators and gyroklystron. During the electron beam through the open end, open cavities can get EM-field of electron beam efficiently Open cavities and closed cavity, are different from that open cavities does not have well-defined boundary conditions, so there has not analytical solution. So, we use two programs Cavity and RFS2 to do numerical simulation to know physical phenomena and significance We started from the introduction of time-domain model and spectral-domain model. In the time domain model, by change the length and taper angle, to know the influences of Quality factor. In the spectral-domain we introduce max-field spectrum, field-energy spectrum and reflection spectrum, and give physical explanations then change some variable and calculate reflection coefficient, to know the influence. In the last, we try to simulate new structure, and make some appropriate physical interpretation, and compare our result to the classic open cavity, to confirm the result is identical or not.
Subjects
open cavity
resonant frequency
quality factor
max-field spectrum
field-energy spectrum
reflection spectrum
Type
thesis
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