Investigation of the 100GHz reentrant linear magnetron using particle-in-cell simulation

The operating characteristics of the 100GHz linear magnetron employing the reentrant resonator are investigated by using a two-dimensional particle-in-cell simulation. The geometrical parameters calculated for the operation frequency of 100GHz are confirmed by the resonant modes and field distribution obtained by an electromagnetic simulation. With the synchronism condition, the effect of number of vane and beam voltage on the power density and the operation frequency are examined. When the beam voltage of 2kV and the external magnetic field of 0.79T are used, the reentrant linear magnetron is oscillated at about 100.2GHz, and the maximum power density with the injected current density of 60A∕cm2 is increased up to 220mW∕mm2 from 125mW∕mm2 due to the extension of interaction region as the number of vane is varied from 10 to 12.