Three-dimensional particle-in-cell analysis of beam-wave interaction in a multi-section severed helix TWT

Author

Naidu, Vemula Bhanu ; Datta, Subrata Kumar ; Reddy, S. Umamaheshwara ; Kumar, Lalit

Author_Institution

Microwave Tube R&D Centre, Defence R&D Organ., Bangalore, India

fYear

2009

fDate

28-30 April 2009

Firstpage

453

Lastpage

454

Abstract

Three-dimensional particle-in-cell analysis of beam-wave interaction was carried out in MAFIA for a multi-section severed helix traveling-wave tube. The severloss was modeled by considering the carbon-coated helix-support rods as lossy dielectric rods having finite conductivity as a step function corresponding to the circuit attenuation constant along the taper-profiled loss in the sever-loss region. The analysis was benchmarked against published 1D large-signal analysis results and close agreement was observed.

Keywords

dielectric devices; travelling wave tubes; 3D particle-in-cell analysis; MAFIA; beam-wave interaction; carbon-coated helix-support rods; lossy dielectric rods; multi-section severed helix traveling-wave tube; Analytical models; Attenuation; Circuit simulation; Coaxial components; Conductivity; Couplers; Dielectric losses; Impedance matching; Structural rods; Time domain analysis; Beam-wave interaction; Multi-section TWT; Particle-in-cell analysis; Sever-loss; Severed TWT;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2009. IVEC '09. IEEE International

Conference_Location

Rome

Print_ISBN

978-1-4244-3500-5

Electronic_ISBN

978-1-4244-3501-2

Type

conf

DOI

10.1109/IVELEC.2009.5193566

Filename

5193566