Title :
Effect of longitudinal magnetic field on microwave efficiency of virtual cathode oscillator
Author :
Jiang, Weihua ; Kitano, Hiroaki ; Huang, Lihong ; Masugata, Katsumi ; Yatsui, Kiyoshi
Author_Institution :
Lab. of Beam Technol., Nagaoka Univ. of Technol., Niigata, Japan
fDate :
2/1/1996 12:00:00 AM
Abstract :
The effect of a longitudinal magnetic field on the microwave efficiency of a virtual cathode oscillator is investigated by particle-in-cell simulations. The mechanism of the oscillation associated with microwave emission is physically understood. It is found that the reflection of the electron beam back to the diode region is important to the oscillation. When a longitudinal magnetic field is applied, the residence time of the electrons in the potential well is lengthened, resulting in a large energy spread of the electron beam, which reduces the output power of the microwave
Keywords :
digital simulation; magnetic field effects; microwave generation; microwave oscillators; vircators; diode region; electron beam; electron beam reflection; energy spread; longitudinal magnetic field; microwave efficiency; microwave emission; microwave output power; oscillation mechanism; particle-in-cell simulations; potential well; residence time; virtual cathode oscillator; Anodes; Cathodes; Diodes; Electromagnetic waveguides; Electron beams; Magnetic fields; Microwave generation; Microwave oscillators; Power generation; Voltage-controlled oscillators;
Journal_Title :
Plasma Science, IEEE Transactions on
