Hot test of gyrotron cavity interaction using a 3D CFDTD PIC method

Author

Lin, M.C. ; Smithe, David N. ; Guss, William C. ; Temkin, Richard J.

Author_Institution

Tech-X Corp., Boulder, CO, USA

fYear

2014

fDate

22-24 April 2014

Firstpage

87

Lastpage

88

Abstract

Modeling a gyrotron cavity interaction in 3D and time-domain is very challenging due to the open-end features of cavity structure and higher-order mode excitation employed to achieve high efficiency. In this work, a 3D conformal finite-difference time-domain (CFDTD) particle-in-cell (PIC) method has been developed to perform a hot test of gyrotron cavity interaction. With a tailored gyrobeam emission, not only forward wave but also backward wave interactions have been observed in an MIT gyrotron cavity, consistent with a recent experiment at MIT. Our preliminary results show that the 3D CFDTD PIC method could provide an alternative modeling tool for studying the gyrotron cavity interaction for further improving efficiency and studying mode competition.

Keywords

backward wave tubes; finite difference time-domain analysis; gyrotrons; 3D CFDTD PIC method; 3D conformal finite-difference time-domain particle-in-cell method; MIT gyrotron cavity; backward wave interactions; cavity structure; forward wave interactions; gyrotron cavity interaction; higher-order mode excitation; hot test; tailored gyrobeam emission; Cavity resonators; Finite difference methods; Gyrotrons; Plasmas; Solid modeling; Three-dimensional displays; Time-domain analysis; 3D CFDTD PIC; Vorpal; backward wave; forward wave; gyrotron cavity;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, IEEE International

Conference_Location

Monterey, CA

Type

conf

DOI

10.1109/IVEC.2014.6857503

Filename

6857503