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Comparative study of dielectric loaded structures for suppressing gyro-BWO instabilities in gyrotron beam-ducts (BD) using HFSS

Stefano Alberti, Jean-Philippe Hogge, Trach-Minh Tran, Fengping Li
2011
Conference paper
Abstract

A comparative study of a variety of electromagnetic (EM) structures designed for suppressing a gyro-BWO instability in the W7-X gyrotron beam-duct is presented. The EM fields are calculated using the finite element code HFSS. It is shown that among dielectric-loaded ring-structures the one having random azimuthal indentations on the copper ring is efficient and so are conical dielectric-loaded structures without copper rings. © 2011 IEEE.

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