Particle-in-cell simulations on a Ka-band, double-slot staggered coupled-cavity traveling-wave tube

This paper focuses on PIC simulations of Ka-band, double-slot staggered coupled-cavity TWT. The coordinate system used in the simulation is a rectangular coordinate system (x, y, z). The paper shows a MAGIC3D model of a double-slot staggered CCTWT circuit. Coupling slots are cut into the wall to separating the cavities. There are two slots rotated 180 degrees about the beam axis in the same wall. The slot location is staggered by 90 degrees for successive walls. The CCTWT employed a reentrant double-slot staggered RF cavity structure. The choice of double staggered slots was made because of the wide frequency bandwidth and the moderate interaction impedance.