Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 68, Issue 12, Pages 6476-6481Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2021.3120969
Keywords
N-body model; nonlinear wave-beam inter-action; short-pulse amplification; time domain; traveling wave tube (TWT); TWT modeling
Ask authors/readers for more resources
Comparative study between two multi-particle time domain methods, DIMOHA and RUBEUS, revealed parallel equations and variables, with DIMOHA being more flexible than RUBEUS. Testing in steady-state simulation explained discrepancies with experimental results and demonstrated excellent agreement with RUBEUS when used for ultra-short pulses.
Many-particle time domain methods are rising alternatives to particle-in-cell (PIC) or frequency methods to simulate the wave-beam interactions in traveling wave tubes (TWTs). We focus on two of those: our Hamiltonian discrete model DIMOHA is compared analytically against the pseudospectral method RUBEUS. Although based on two completely different approaches-the Gel'fand transform for DIMOHA and the telegraphist circuit for RUBEUS-we surprisingly find out that they share perfectly parallel sets of equations and variables. However, we conclude that DIMOHA is more flexible than RUBEUS in terms of pitch tapering and absorbing boundary conditions. It also shows excellent stability for steady-state simulation, allowing us to explain some discrepancies of RUBEUS with experimental results. These come from a standing wave pattern which is detectable in the vicinity of the sever. Finally, DIMOHA is tested for the first time with ultra-short pulses and exhibits excellent agreement with RUBEUS.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available