Title :
COLLECT3D code for accurate multistage collector simulation
Author :
Le Clair, A. ; Lamy, D. ; Thaler, Y. ; David, J.F. ; Thouvenin, Ph.
Author_Institution :
Thales Electron Devices, Velizy, France
Abstract :
The computer code COLLECT3D was written in 1998 in order to get a realistic and efficient modeling tool for multistage collector design improvement. This is a time dependent PIC code representing the beam in macro-particles and taking into account the 3D geometry, the 3D magnetic field distribution and the secondary or reflected electron emission. It is now intensively used at T.E.D. for efficiency optimization purpose in combination with the new 2.5D interaction codes (MVTRAD for helix TWTs and KLYS 2D for klystrons) which use the same beam modeling. The simulation results obtained from these new tools are very close to measured test data and open the way for further efficiency improvements on space TWTs and telecom tubes. They are also very useful to optimize klystron designs to get high efficiency without reflected electrons.
Keywords :
electron optics; electronic engineering computing; finite element analysis; klystrons; particle beam bunching; travelling wave tubes; 2.5D interaction codes; 3D geometry; 3D magnetic field distribution; COLLECT3D computer code; beam bunching; beam optics; efficiency optimization; electromagnetic fields computation; finite element method; helix TWT; klystrons; macroparticles; magnetic collector; modeling tool; multistage collector simulation; reflected electron emission; secondary electron emission; thermal stresses; time dependant PIC code; Computational modeling; Design optimization; Electron emission; Klystrons; Magnetic analysis; Magnetic field measurement; Magnetic fields; Optical beams; Particle beam injection; Thermal stresses;
Conference_Titel :
Vacuum Electronics Conference, 2002. IVEC 2002. Third IEEE International
Print_ISBN :
0-7803-7256-5
DOI :
10.1109/IVELEC.2002.999362
