Title :
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
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;
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
DOI :
10.1109/IVELEC.2009.5193566
