Title :
A 6.7 GHz, TM040 triple-beam monotron
Author :
Barroso, Joaquim J.
Author_Institution :
Associated Plasma Lab., Nat. Inst. for Space Res., Sao Jose de Campos, Brazil
Abstract :
Since a monotron does not require an externally-applied magnetic field, the system comprises a simple structure where the elementary functions of electron bunching and energy transfer to the RF field are performed in a single circular cylindrical cavity, which makes the monotron a compact, lightweight device. Exploring the monotron concept, the present paper describes a triple-beam TM040, 6.7 GHz monotron where each beam is injected into the resonant cavity at 80 A current and 10 keV energy. At this injection energy, a maximal conversion efficiency of 18.5 % is predicted for optimum cavity dimensions. To verify the efficiency predicted by 1D theory, as well as to examine the viability of a triple-beam TM040 monotron as a high-power microwave source, a particle-in-cell simulation is carried out by using the electromagnetic, PIC code KARAT.
Keywords :
cavity resonators; microwave tubes; particle beam bunching; 10 keV; 18.5 percent; 1D theory; 6.7 GHz; 80 A; RF field energy transfer; TM040 triple-beam monotron; cavity injection energy; conversion efficiency; electron bunching; high-power microwave source; particle-in-cell simulation; resonant cavity; single circular cylindrical cavity; Conductivity; Electromagnetic scattering; Electromagnetic waveguides; Electron beams; History; Plasmas; Power generation; Radio frequency; Steady-state; Voltage;
Conference_Titel :
Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International
Print_ISBN :
0-7803-8261-7
DOI :
10.1109/IVELEC.2004.1316336
