DISPERSION IN SINUSOIDALLY CORRUGATED COAXIAL CABLES
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Authors
Cravey, David B.
Subjects
geometric dispersion
impulse response
electromagnetism
corrugated cables
impulse response
electromagnetism
corrugated cables
Advisors
Garren, David A.
Date of Issue
2024-09
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
Live analysis of signals sent through corrugated transmission lines have been of continual interest at particle accelerator facilities. As such, it is imperative that all available insight into potential signals sent through a given transmission line be fully analyzed. Geometric dispersion of simulated signal impulses transmitted through corrugated coaxial cabling is studied and analyzed. In utilizing software such as MATLAB and COMSOL Multiphysics, a dispersion curve is generated based on the geometry of the cable, boundary conditions, and the material properties. Input signals can have varying frequencies and shapes. An analytic expression is attempted in order to model the simulated dispersion curves. The aim is the development of a transfer function and impulse response that could be applied to any input signal to accurately predict the output, subject to constraints. Geometric dispersion is investigated via time, eigenfrequency, and single/swept frequency simulations. Maxwell capacitance measurements are also calculated to determine any possible correlation to the dispersion effects. Eigenfrequency simulations performed include varying parameters such as corrugation periodicity, corrugation depth, and cable radii. Results show apparent scalar relationships for the linear phase advance correction when compared to both changes in outer corrugation depth, as well as changes in cellular periodicity. The same effect is seen with respect to Maxwell capacitance values.
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Thesis
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Distribution Statement
Distribution Statement A. Approved for public release: Distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.