Title :
Electromagnetic simulation of a 32-GHz, TE021 gyrotron
Author :
Barroso, Joaquim J. ; Kostov, Konstantin G. ; Correa, Rafael A.
Author_Institution :
Associated Plasma Lab., Nat. Inst. for Space Res., Sao Jose dos Campos, SP, Brazil
fDate :
4/1/1999 12:00:00 AM
Abstract :
A simulation study with experimental parameters of a 32-GHz gyrotron operating in the TE021 mode is presented. Beam electrons with typical energy of 40 keV and transverse-to-axial velocity ratio ranging from α=0.8 to α=2.0 are injected into the cavity to drive electromagnetic oscillations from noise. On the basis of an electromagnetic particle-in-cell (PIC) code, a parameterization study is carried out to determine the dependence of output power upon pitch ratio and beam current. A comparison of the PIC simulation results with the predictions of the fixed-field approximation on considering Gaussian and asymmetric profiles has indicated close agreement between field parameters and conversion efficiency corresponding to both approaches
Keywords :
electrodynamics; electromagnetic fields; gyrotrons; microwave generation; 32 GHz; 40 keV; Gaussian profiles; TE021 gyrotron; asymmetric profiles; beam current; beam electrons; conversion efficiency; electromagnetic oscillations; electromagnetic particle-in-cell; electromagnetic simulation; fixed-field approximation; output power; parameterization study; pitch ratio; transverse-to-axial velocity ratio; Electron beams; Gyrotrons; Heating; Microwave generation; Nonlinear equations; Particle beams; Plasma materials processing; Plasma waves; Radio frequency; Tellurium;
Journal_Title :
Plasma Science, IEEE Transactions on
